diff --git a/Makefile b/Makefile
index ada4f97..86bc46d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,18 +1,12 @@
 
-# have the .c in a "srcs/" directory
-# have the .h in a "includes/" directory
+# - - - - - - - - - - - - - - #		name =	value \
+#       variables names       #				value
+# - - - - - - - - - - - - - - #		! name is case sensitive
 
-# - - - - - - - - - - - - - - #
-#       variables names       #
-# - - - - - - - - - - - - - - #
-#	name =	value \
-#			value
-#	name is case sensitive
-
-# VPATH	where to look for rules preriquisites not found in "./"
-#		best to use only for ".c", not ".o" nor ".h"
 NAME   = fdf
+
 CC     = gcc
+
 VPATH  = srcs
 
 IDIR   = ./includes
@@ -23,7 +17,10 @@ LDIR   = ./libft
 _LIBS  = libft.a
 LIBS   = $(_LIBS:lib%.a=%)
 
-SRCS   = fdf.c
+SRCS   =	fdf.c \
+			draw.c \
+			parse.c \
+			modifs.c
 
 ODIR   = ./builds
 OBJS   = $(SRCS:%.c=$(ODIR)/%.o)
@@ -34,12 +31,10 @@ LFLAGS = -L$(LDIR) -l$(LIBS)
 CFLAGS += -I./minilibx-linux-master
 LFLAGS += -lm -lmlx -lXext -lX11 -L./minilibx-linux-master
 
-# - - - - - - - - - - - - - - #
-#      rules to execute       #
-# - - - - - - - - - - - - - - #
-#	target:	prerequisites ...
-#			recipe ...
 
+# - - - - - - - - - - - - - - #	target:	prerequisites	| $@ : target
+#      rules to execute       #			recipe			| $< : 1st prerequisite
+# - - - - - - - - - - - - - - #			recipe			| $^ : all prerequisites
 
 all: $(NAME)
 
@@ -67,12 +62,16 @@ clean:
 	/bin/rm -f $(OBJS)
 
 fclean: clean
-	make fclean -C $(LDIR)
 	/bin/rm -rf $(ODIR)
 	/bin/rm -f $(NAME)
 	/bin/rm -rf a.out a.out.dSYM
 
+libfclean:
+	make fclean -C $(LDIR)
+
 re: fclean all
 
+relib: libfclean re
+
 .PHONY: all clean fclean re gcc
 
diff --git a/builds/draw.o b/builds/draw.o
new file mode 100644
index 0000000..8f643b6
Binary files /dev/null and b/builds/draw.o differ
diff --git a/builds/fdf.o b/builds/fdf.o
index 13757ae..2e9e51b 100644
Binary files a/builds/fdf.o and b/builds/fdf.o differ
diff --git a/builds/modifs.o b/builds/modifs.o
new file mode 100644
index 0000000..230d5e2
Binary files /dev/null and b/builds/modifs.o differ
diff --git a/builds/parse.o b/builds/parse.o
new file mode 100644
index 0000000..a318411
Binary files /dev/null and b/builds/parse.o differ
diff --git a/fdf b/fdf
index bc6ef44..c137133 100755
Binary files a/fdf and b/fdf differ
diff --git a/includes/fdf.h b/includes/fdf.h
index 5706f47..500c796 100644
--- a/includes/fdf.h
+++ b/includes/fdf.h
@@ -5,6 +5,7 @@
 # include <mlx.h>
 # include <unistd.h>	// for sleep()
 # include <math.h>		// for M_PI
+# include <stdio.h>		// for printf()
 
 typedef struct	s_fdf
 {
@@ -31,11 +32,25 @@ typedef struct	s_fdf
 	int			mov_x;
 	int			mov_y;
 	int			max_z;
+	int			zoom;
 	int			img_bpp;
 	int			img_sizel;
 	int			img_endian;
 }				t_fdf;
 
+t_fdf	*init_fdf(void);
+int		print_keycode(int keycode);
+int		shut_down(t_fdf *fdf);
+void	draw_image(t_fdf *fdf);
+void	draw_pixel(t_fdf *fdf, int x, int y, int color);
+void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z);
+int		keypress(int keycode, t_fdf *fdf);
+void	rotation_state(t_fdf *fdf);
+int		**parse_map(t_fdf *fdf);
+int		*new_coordinates(t_fdf *fdf, int i, int j);
+void	draw_lines(t_fdf *fdf, int *start, int *end);
+void	draw_grid(t_fdf *fdf, int i, int j);
+
 # define ESCAPE			65307
 # define UP				65362
 # define DOWN			65364
diff --git a/srcs/draw.c b/srcs/draw.c
new file mode 100644
index 0000000..be475a8
--- /dev/null
+++ b/srcs/draw.c
@@ -0,0 +1,94 @@
+#include "fdf.h"
+
+void	draw_image(t_fdf *fdf)
+{
+	int i;
+	int j;
+
+	fdf->rad_x = fdf->rot_x * M_PI / 180;
+	fdf->rad_y = fdf->rot_y * M_PI / 180;
+	//fdf->altitude *= (fdf->offset + fdf->zoom) / fdf->offset;
+	i =-1;
+	while (++i < fdf->img_size_y * fdf->img_sizel)
+		*(unsigned int*)(fdf->img_addr + i) = 0;
+	j = -1;
+	while (++j < fdf->map_height)
+	{
+		i = -1;
+		while (++i < fdf->map_width)
+			draw_grid(fdf, i, j);
+	}
+	mlx_put_image_to_window(fdf->mlx_ptr, fdf->win_ptr, fdf->img_ptr, 0, 0);
+	rotation_state(fdf);
+}
+
+void	draw_grid(t_fdf *fdf, int i, int j)
+{
+	int *point_start;
+	int *point_end;
+
+	point_start = new_coordinates(fdf, i, j);
+	point_end = NULL;
+	if (i + 1 < fdf->map_width)
+		point_end = new_coordinates(fdf, i + 1, j);
+	draw_lines(fdf, point_start, point_end);
+	if (j + 1 < fdf->map_height)
+		point_end = new_coordinates(fdf, i, j + 1);
+	draw_lines(fdf, point_start, point_end);
+}
+
+void	draw_lines(t_fdf *fdf, int *start, int *end)
+{
+	int dx;
+	int dy;
+	int z;
+	int i;
+	int j;
+
+	if (end)
+	{
+		dx = end[0] - start[0];
+		dy = end[1] - start[1];
+		i = 0;
+		j = 0;
+		z = start[2];
+		while (ft_abs(i) <= ft_abs(dx) && ft_abs(j) <= ft_abs(dy))
+		{
+			if ((dx + dy) && (i + j))
+				z = start[2] + (end[2] - start[2]) * (i + j) / (dx + dy);
+			draw_color_pixel(fdf, start[0] + i, start[1] + j, z);
+			if (!ft_abs(dx) || ft_abs(j) < ft_abs(i * dy / dx))
+				j += ft_sign(dy);
+			else
+				i += ft_sign(dx);
+		}
+	}
+}
+
+void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z)
+{
+	int color;
+
+	color = 0xffffff;
+	z = z / fdf->altitude;
+	if (z)
+	{
+		color = color ^ (((0xff / fdf->max_z) * z) << 8 );
+		color = color ^ ((0xff / fdf->max_z) * z);
+	}
+	draw_pixel(fdf, new_x, new_y, color);
+}
+
+void	draw_pixel(t_fdf *fdf, int x, int y, int color)
+{
+	int position;
+	int xmax;
+	int ymax;
+
+	xmax = fdf->img_sizel / (fdf->img_bpp / 8);
+	ymax = fdf->img_size_y;
+	if (x < 0 || y < 0 || x > xmax || y > ymax)
+		return ;
+	position = y * fdf->img_sizel + x * fdf->img_bpp / 8;
+	*(unsigned int*)(fdf->img_addr + position) = color;
+}
diff --git a/srcs/fdf.c b/srcs/fdf.c
index 5ea3d7e..9f755a0 100644
--- a/srcs/fdf.c
+++ b/srcs/fdf.c
@@ -1,79 +1,40 @@
 #include "fdf.h"
-#include <stdio.h>
 
-t_fdf	*init_fdf(void);
-int		print_keycode(int keycode);
-int		shut_down(t_fdf *fdf);
-void	draw_image(t_fdf *fdf);
-void	draw_pixel(t_fdf *fdf, int x, int y, int color);
-void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z);
-int		keypress(int keycode, t_fdf *fdf);
-void	rotation_state(t_fdf *fdf);
-int		**parse_map(t_fdf *fdf);
-int		*new_coordinates(t_fdf *fdf, int i, int j);
-
-void	draw_lines(t_fdf *fdf, int *start, int *end)
+int		shut_down(t_fdf *fdf)
 {
-	int dx;
-	int dy;
-	int z;
-	int i;
-	int j;
-
-	if (end)
-	{
-		dx = end[0] - start[0];
-		dy = end[1] - start[1];
-		i = 0;
-		j = 0;
-		z = start[2];
-		while (ft_abs(i) <= ft_abs(dx) && ft_abs(j) <= ft_abs(dy))
-		{
-			if ((dx + dy) && (i + j))
-				z = start[2] + (end[2] - start[2]) * (i + j) / (dx + dy);
-			draw_color_pixel(fdf, start[0] + i, start[1] + j, z);
-			if (!ft_abs(dx) || ft_abs(j) < ft_abs(i * dy / dx))
-				j += ft_sign(dy);
-			else
-				i += ft_sign(dx);
-		}
-	}
+	mlx_destroy_window(fdf->mlx_ptr, fdf->win_ptr);
+	exit(0);
+	free(fdf);
+	return (0);
 }
 
-// point[0], point[1], point[2] -> new x, new y, new z
-void	draw_point_n_lines(t_fdf *fdf, int i, int j)
+t_fdf	*init_fdf(void)
 {
-	int *point_start;
-	int *point_end;
+	t_fdf	*fdf;
 
-	point_start = new_coordinates(fdf, i, j);
-	point_end = NULL;
-	if (i + 1 < fdf->map_width)
-		point_end = new_coordinates(fdf, i + 1, j);
-	draw_lines(fdf, point_start, point_end);
-}
-
-void	draw_image(t_fdf *fdf)
-{
-	int i;
-	int j;
-
-	// init image with 0
-	i =-1;
-	while (++i < fdf->img_size_y * fdf->img_sizel)
-		*(unsigned int*)(fdf->img_addr + i) = 0;
-	// draw image
-	j = -1;
-	while (++j < fdf->map_height)
-	{
-		i = -1;
-		while (++i < fdf->map_width)
-			draw_point_n_lines(fdf, i, j);
-	}
-	// put image on screen
-	mlx_put_image_to_window(fdf->mlx_ptr, fdf->win_ptr, fdf->img_ptr, 0, 0);
-	// put rotation on screen
-	rotation_state(fdf);
+	fdf = malloc(sizeof(t_fdf));
+	fdf->offset = 50;
+	fdf->margin = 50;
+	fdf->altitude = 3;
+	fdf->map = parse_map(fdf);
+	fdf->win_size_x = fdf->map_size_x + 2 * fdf->margin;
+	fdf->win_size_y = fdf->map_size_y + 2 * fdf->margin;
+	fdf->img_size_x = fdf->win_size_x;
+	fdf->img_size_y = fdf->win_size_y;
+	fdf->rot_x = 0;
+	fdf->rot_y = 0;
+	fdf->mov_x = 0;
+	fdf->mov_y = 0;
+	fdf->zoom = 0;
+	fdf->mlx_ptr = mlx_init();
+	fdf->win_ptr = mlx_new_window(fdf->mlx_ptr, fdf->win_size_x,
+										fdf->win_size_y, "test");
+	fdf->img_ptr = mlx_new_image(fdf->mlx_ptr, fdf->img_size_x,
+												fdf->img_size_y);
+	fdf->img_addr = mlx_get_data_addr(fdf->img_ptr, &(fdf->img_bpp),
+								&(fdf->img_sizel), &(fdf->img_endian));
+	draw_image(fdf);
+	return (fdf);
 }
 
 int		main(int ac, char **av)
@@ -84,197 +45,12 @@ int		main(int ac, char **av)
 	(void)ac;
 
 	fdf = init_fdf();
-	// receive a keypress event
 	mlx_hook(fdf->win_ptr, 2, 1L << 0, keypress, fdf);
-	// receive event when clicking the button to close the window
 	mlx_hook(fdf->win_ptr, 17, 1L << 17, shut_down, fdf);
-	// run window when no events occurs
 	mlx_loop(fdf->mlx_ptr);
 	return (0);
 }
 
-// return an int[3] : int[0] = x, int[1] = y, int[2] = z
-int	*new_coordinates(t_fdf *fdf, int i, int j)
-{
-	int x;
-	int y;
-	int z;
-	int	*point;
-
-	point = ft_calloc(3, sizeof(int));
-	x = i * fdf->offset - (fdf->map_size_x / 2);
-	y = j * fdf->offset - (fdf->map_size_y / 2);
-	z = fdf->map[j][i] * fdf->altitude;
-	point[0] = x * cos(fdf->rad_x) + y * sin(fdf->rad_x);
-	point[1] = y * cos(fdf->rad_x) - x * sin(fdf->rad_x);
-	point[1] = point[1] * cos(fdf->rad_y) - -z * sin(fdf->rad_y);
-	point[0] += fdf->margin + fdf->mov_x + (fdf->map_size_x / 2);
-	point[1] += fdf->margin + fdf->mov_y + (fdf->map_size_y / 2);
-	point[2] = z;
-	return (point);
-}
-
-int		keypress(int keycode, t_fdf *fdf)
-{
-	if (keycode == ESCAPE)
-		shut_down(fdf);
-	else if (keycode == LEFT)
-		(fdf->rot_x) += 1;
-	else if (keycode == RIGHT)
-		(fdf->rot_x) -= 1;
-	else if (keycode == UP)
-		(fdf->rot_y) += 1;
-	else if (keycode == DOWN)
-		(fdf->rot_y) -= 1;
-	else if (keycode == Q)
-		(fdf->mov_x) -= 6;
-	else if (keycode == D)
-		(fdf->mov_x) += 6;
-	else if (keycode == Z)
-		(fdf->mov_y) += 6;
-	else if (keycode == S)
-		(fdf->mov_y) -= 6;
-	else
-		print_keycode(keycode);
-	// calculate radians
-	fdf->rad_x = fdf->rot_x * M_PI / 180;
-	fdf->rad_y = fdf->rot_y * M_PI / 180;
-	// draw image
-	draw_image(fdf);
-	return (0);
-}
-
-int		print_keycode(int keycode)
-{
-	ft_putnbr(keycode);
-	ft_putchar(' ');
-	return(0);
-}
-
-void	draw_pixel(t_fdf *fdf, int x, int y, int color)
-{
-	int position;
-	int xmax;
-	int ymax;
-
-	xmax = fdf->img_sizel / (fdf->img_bpp / 8);
-	ymax = fdf->img_size_y;
-	if (x < 0 || y < 0 || x > xmax || y > ymax)
-		return ;
-	position = y * fdf->img_sizel + x * fdf->img_bpp / 8;
-	*(unsigned int*)(fdf->img_addr + position) = color;
-}
-
-void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z)
-{
-	int color;
-
-	color = 0xffffff;
-	z = z / fdf->altitude;
-	if (z)
-	{
-		color = color ^ (((0xff / fdf->max_z) * z) << 8 );
-		color = color ^ ((0xff / fdf->max_z) * z);
-	}
-	draw_pixel(fdf, new_x, new_y, color);
-}
-
-void	rotation_state(t_fdf *fdf)
-{
-	char	*position;
-	int		x;
-	int		y;
-
-	x = fdf->img_size_x - 10;
-	y = fdf->img_size_y - 10;
-	position = ft_strjoin(ft_itoa(fdf->rot_x), ft_strdup(" | "));
-	position = ft_strjoin(position, ft_itoa(fdf->rot_y));
-	x -= ft_strlen(position) * 6;
-	mlx_string_put(fdf->mlx_ptr, fdf->win_ptr, x, y, 0xffffff, position);
-}
-
-t_fdf	*init_fdf(void)
-{
-	t_fdf	*fdf;
-
-	fdf = malloc(sizeof(t_fdf));
-	// map offset, margin, and altitude factor
-	fdf->offset = 50;
-	fdf->margin = 50;
-	fdf->altitude = 3;
-	// parse map
-	fdf->map = parse_map(fdf);
-	// size window
-	fdf->win_size_x = fdf->map_size_x + 2 * fdf->margin;
-	fdf->win_size_y = fdf->map_size_y + 2 * fdf->margin;
-	// size image
-	fdf->img_size_x = fdf->win_size_x;
-	fdf->img_size_y = fdf->win_size_y;
-	// view rotation
-	fdf->rot_x = 0;
-	fdf->rot_y = 0;
-	// x and y deplacements
-	fdf->mov_x = 0;
-	fdf->mov_y = 0;
-	// init connexion to server
-	fdf->mlx_ptr = mlx_init();
-	// create the window
-	fdf->win_ptr = mlx_new_window(fdf->mlx_ptr, fdf->win_size_x, fdf->win_size_y, "test");
-	// create image
-	fdf->img_ptr = mlx_new_image(fdf->mlx_ptr, fdf->img_size_x, fdf->img_size_y);
-	fdf->img_addr = mlx_get_data_addr(fdf->img_ptr, &(fdf->img_bpp), &(fdf->img_sizel), &(fdf->img_endian));
-	// draw image
-	draw_image(fdf);
-	return (fdf);
-}
-
-int	**parse_map(t_fdf *fdf)
-{
-	int	**map;
-	int	i;
-	int	j;
-
-	map = ft_calloc(10, sizeof(map));
-	i = -1;
-	while (++i < 10)
-	{
-		map[i] = ft_calloc(15, sizeof(*map));
-		j = -1;
-		while(++j < 15)
-			map[i][j] = 0;
-	}
-	map[9][0] = 1;
-	map[9][1] = 2;
-	map[9][2] = 3;
-	map[9][3] = 4;
-	map[9][4] = 5;
-	map[9][5] = 6;
-	map[9][6] = 7;
-	map[9][7] = 8;
-	map[9][8] = 9;
-	map[9][9] = 10;
-	map[9][10] = 2;
-	map[9][11] = 5;
-	map[9][12] = 8;
-	map[9][13] = 3;
-	map[9][14] = 6;
-	fdf->max_z = 10;
-	// size map
-	fdf->map_width = j;
-	fdf->map_height = i;
-	fdf->map_size_x = --j * fdf->offset + 1;
-	fdf->map_size_y = --i * fdf->offset + 1;
-	return (map);
-}
-
-int		shut_down(t_fdf *fdf)
-{
-	mlx_destroy_window(fdf->mlx_ptr, fdf->win_ptr);
-	exit(0);
-	free(fdf);
-	return (0);
-}
-
 /*
 ** w forward	119
 ** a left		97
diff --git a/srcs/modifs.c b/srcs/modifs.c
new file mode 100644
index 0000000..c06fd45
--- /dev/null
+++ b/srcs/modifs.c
@@ -0,0 +1,85 @@
+#include "fdf.h"
+
+// add "print_keycode(keycode);" at begining to print keycode
+int		keypress(int keycode, t_fdf *fdf)
+{
+	if (keycode == ESCAPE)
+		shut_down(fdf);
+	else if (keycode == LEFT)
+		(fdf->rot_x) += 1;
+	else if (keycode == RIGHT)
+		(fdf->rot_x) -= 1;
+	else if (keycode == UP)
+		(fdf->rot_y) += 1;
+	else if (keycode == DOWN)
+		(fdf->rot_y) -= 1;
+	else if (keycode == Q)
+		(fdf->mov_x) -= 6;
+	else if (keycode == D)
+		(fdf->mov_x) += 6;
+	else if (keycode == Z)
+		(fdf->mov_y) -= 6;
+	else if (keycode == S)
+		(fdf->mov_y) += 6;
+	else if (keycode == A)
+		(fdf->zoom) += 6;
+	else if (keycode == W)
+		(fdf->zoom) -= 6;
+	draw_image(fdf);
+	return (0);
+}
+
+// return an int[3] : int[0] = x, int[1] = y, int[2] = z
+int	*new_coordinates(t_fdf *fdf, int i, int j)
+{
+	int x;
+	int y;
+	int z;
+	int	*point;
+
+	point = ft_calloc(3, sizeof(int));
+	// pre zoom
+	x = i * (fdf->offset + fdf->zoom);
+	y = j * (fdf->offset + fdf->zoom);
+	// pre center
+	x -= (fdf->map_size_x + fdf->zoom * fdf->map_width) / 2;
+	y -= (fdf->map_size_y + fdf->zoom * fdf->map_height) / 2;
+	// rotation
+	z = fdf->map[j][i] * fdf->altitude;
+	point[0] = x * cos(fdf->rad_x) + y * sin(fdf->rad_x);
+	point[1] = y * cos(fdf->rad_x) - x * sin(fdf->rad_x);
+	point[1] = point[1] * cos(fdf->rad_y) - -z * sin(fdf->rad_y);
+	// deplacements
+	point[0] += fdf->margin + fdf->mov_x;
+	point[1] += fdf->margin + fdf->mov_y;
+	// post zoom
+	point[0] -= ((fdf->map_size_x / 2) / fdf->offset) * fdf->zoom;
+	point[1] -= ((fdf->map_size_y / 2) / fdf->offset) * fdf->zoom;
+	// post center
+	point[0] += (fdf->map_size_x + fdf->zoom * fdf->map_width) / 2;
+	point[1] += (fdf->map_size_y + fdf->zoom * fdf->map_height) / 2;
+
+	point[2] = z;
+	return (point);
+}
+
+int		print_keycode(int keycode)
+{
+	ft_putnbr(keycode);
+	ft_putchar(' ');
+	return(0);
+}
+
+void	rotation_state(t_fdf *fdf)
+{
+	char	*position;
+	int		x;
+	int		y;
+
+	x = fdf->img_size_x - 10;
+	y = fdf->img_size_y - 10;
+	position = ft_strjoin(ft_itoa(fdf->rot_x), ft_strdup(" | "));
+	position = ft_strjoin(position, ft_itoa(fdf->rot_y));
+	x -= ft_strlen(position) * 6;
+	mlx_string_put(fdf->mlx_ptr, fdf->win_ptr, x, y, 0xffffff, position);
+}
diff --git a/srcs/parse.c b/srcs/parse.c
new file mode 100644
index 0000000..6443c5d
--- /dev/null
+++ b/srcs/parse.c
@@ -0,0 +1,40 @@
+#include "fdf.h"
+
+int	**parse_map(t_fdf *fdf)
+{
+	int	**map;
+	int	i;
+	int	j;
+
+	map = ft_calloc(10, sizeof(map));
+	i = -1;
+	while (++i < 10)
+	{
+		map[i] = ft_calloc(15, sizeof(*map));
+		j = -1;
+		while(++j < 15)
+			map[i][j] = 0;
+	}
+	map[9][0] = 1;
+	map[9][1] = 2;
+	map[9][2] = 3;
+	map[9][3] = 4;
+	map[9][4] = 5;
+	map[9][5] = 6;
+	map[9][6] = 7;
+	map[9][7] = 8;
+	map[9][8] = 9;
+	map[9][9] = 10;
+	map[9][10] = 2;
+	map[9][11] = 5;
+	map[9][12] = 8;
+	map[9][13] = 3;
+	map[9][14] = 6;
+	fdf->max_z = 10;
+	// size map
+	fdf->map_width = j;
+	fdf->map_height = i;
+	fdf->map_size_x = --j * fdf->offset + 1;
+	fdf->map_size_y = --i * fdf->offset + 1;
+	return (map);
+}