diff --git a/Makefile b/Makefile
index d2053d6..83d773e 100644
--- a/Makefile
+++ b/Makefile
@@ -18,13 +18,20 @@ _LIBS  = libft.a
 LIBS   = $(_LIBS:lib%.a=%)
 
 SRCS   =	fdf.c \
-			draw.c \
 			parse.c \
 			modifs.c \
+			draw.c \
 			keypress.c
 
+SRCS_B =	fdf.c \
+			parse.c \
+			modifs.c \
+			keypress_bonus.c \
+			draw_bonus.c
+
 ODIR   = ./builds
 OBJS   = $(SRCS:%.c=$(ODIR)/%.o)
+OBJS_B = $(SRCS_B:%.c=$(ODIR)/%.o)
 
 # flag -g generates debug informations, g3 is maximal version
 CFLAGS = -I$(IDIR) -g3 -Wall -Wextra -Werror
@@ -39,17 +46,17 @@ LFLAGS += -lm -lmlx -lXext -lX11 -L./minilibx-linux-master
 
 all: $(NAME)
 
-# it verify if anything has changed in .c and .h files
-# then it makes LDIR library, then it compiles NAME
 $(NAME): $(ODIR) $(OBJS) $(DEPS)
 	make -C $(LDIR)
 	$(CC) $(CFLAGS) -o $@ $(OBJS) $(LFLAGS)
 
-# create "builds/" if doesn't exist
+bonus: fclean $(ODIR) $(OBJS_B) $(DEPS)
+	make -C $(LDIR)
+	$(CC) $(CFLAGS) -o fdf $(OBJS_B) $(LFLAGS)
+
 $(ODIR):
 	mkdir -p $@
 
-# if a file.c has been modified, it's recompiled in object file.o
 $(ODIR)/%.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
@@ -61,7 +68,7 @@ leaks: $(NAME)
 #	valgrind --leak-check=full --leak-resolution=low --show-reachable=yes ./$(NAME) maps/42_color.fdf
 
 clean:
-	/bin/rm -f $(OBJS)
+	/bin/rm -f $(OBJS) $(OBJS_B)
 
 fclean: clean
 	/bin/rm -rf $(ODIR)
diff --git a/bonus b/bonus
new file mode 100755
index 0000000..b1be388
Binary files /dev/null and b/bonus differ
diff --git a/builds/draw.o b/builds/draw.o
deleted file mode 100644
index 11ce548..0000000
Binary files a/builds/draw.o and /dev/null differ
diff --git a/builds/draw_bonus.o b/builds/draw_bonus.o
new file mode 100644
index 0000000..06d9aae
Binary files /dev/null and b/builds/draw_bonus.o differ
diff --git a/builds/keypress.o b/builds/keypress.o
deleted file mode 100644
index e979b5f..0000000
Binary files a/builds/keypress.o and /dev/null differ
diff --git a/builds/keypress_bonus.o b/builds/keypress_bonus.o
new file mode 100644
index 0000000..98c6a49
Binary files /dev/null and b/builds/keypress_bonus.o differ
diff --git a/fdf b/fdf
index fe826b0..b1be388 100755
Binary files a/fdf and b/fdf differ
diff --git a/srcs/draw.c b/srcs/draw.c
index 4d1e969..b63e863 100644
--- a/srcs/draw.c
+++ b/srcs/draw.c
@@ -18,7 +18,6 @@ void	draw_image(t_fdf *fdf)
 			draw_grid(fdf, i, j);
 	}
 	mlx_put_image_to_window(fdf->mlx_ptr, fdf->win_ptr, fdf->img_ptr, 0, 0);
-	position_state(fdf);
 }
 
 void	draw_grid(t_fdf *fdf, int i, int j)
diff --git a/srcs/draw_bonus.c b/srcs/draw_bonus.c
new file mode 100644
index 0000000..4d1e969
--- /dev/null
+++ b/srcs/draw_bonus.c
@@ -0,0 +1,99 @@
+#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;
+	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);
+	position_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)
+	{
+		free(point_end);
+		point_end = new_coordinates(fdf, i, j + 1);
+	}
+	draw_lines(fdf, point_start, point_end);
+	free(point_start);
+	free(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->zoom) / fdf->offset;
+	z /= fdf->altitude;
+	if (z > fdf->min_z && fdf->z_amplitude)
+	{
+		color = color ^ (((0xff / fdf->z_amplitude) * (z - fdf->min_z)) << 16);
+		color = color ^ (((0xff / fdf->z_amplitude) * (z - fdf->min_z)) << 0);
+	}
+	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/keypress.c b/srcs/keypress.c
index b0b0801..7e872e4 100644
--- a/srcs/keypress.c
+++ b/srcs/keypress.c
@@ -1,69 +1,9 @@
 #include "fdf.h"
 
-/*
-** U -> up wiew
-** I -> isometric original view
-** O -> increase altitude
-** P -> decrease altitude
-** F -> fit to window
-** C -> center
-*/
-void	keypress_more(int keycode, t_fdf *fdf)
-{
-	if (keycode == A)
-		fdf->zoom += 1;
-	else if (keycode == W)
-		fdf->zoom -= 1;
-	else if (keycode == U)
-	{
-		fdf->rot_x = 0;
-		fdf->rot_y = 0;
-	}
-	else if (keycode == I)
-	{
-		fdf->rot_x = -45;
-		fdf->rot_y = -35;
-		fdf->mov_x = (fdf->win_size_x - fdf->map_size_x) / 2;
-		fdf->mov_y = (fdf->win_size_y - fdf->map_size_y) / 2;
-		fdf->zoom = 0;
-	}
-	else if (keycode == O)
-		fdf->altitude++;
-	else if (keycode == P)
-		if (fdf->altitude > 1)
-			fdf->altitude--;
-}
-
-/*
-** Q -> move left
-** D -> move right
-** Z -> move up
-** S -> move down
-** A -> zoom
-** W -> unzoom
-*/
 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
-		keypress_more(keycode, fdf);
 	draw_image(fdf);
 	return (0);
 }
diff --git a/srcs/keypress_bonus.c b/srcs/keypress_bonus.c
new file mode 100644
index 0000000..b0b0801
--- /dev/null
+++ b/srcs/keypress_bonus.c
@@ -0,0 +1,69 @@
+#include "fdf.h"
+
+/*
+** U -> up wiew
+** I -> isometric original view
+** O -> increase altitude
+** P -> decrease altitude
+** F -> fit to window
+** C -> center
+*/
+void	keypress_more(int keycode, t_fdf *fdf)
+{
+	if (keycode == A)
+		fdf->zoom += 1;
+	else if (keycode == W)
+		fdf->zoom -= 1;
+	else if (keycode == U)
+	{
+		fdf->rot_x = 0;
+		fdf->rot_y = 0;
+	}
+	else if (keycode == I)
+	{
+		fdf->rot_x = -45;
+		fdf->rot_y = -35;
+		fdf->mov_x = (fdf->win_size_x - fdf->map_size_x) / 2;
+		fdf->mov_y = (fdf->win_size_y - fdf->map_size_y) / 2;
+		fdf->zoom = 0;
+	}
+	else if (keycode == O)
+		fdf->altitude++;
+	else if (keycode == P)
+		if (fdf->altitude > 1)
+			fdf->altitude--;
+}
+
+/*
+** Q -> move left
+** D -> move right
+** Z -> move up
+** S -> move down
+** A -> zoom
+** W -> unzoom
+*/
+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
+		keypress_more(keycode, fdf);
+	draw_image(fdf);
+	return (0);
+}