draw_set_alpha(alpha);
draw_set_color(c_black);
draw_rectangle(0, 0, room_width, room_height);
alpha += 0.01

if visible && image_alpha < 1    image_alpha += 0.01

pressed = true;

if pressed released = true

if pressed
{
     x = mouse_x;
     y = mouse_y;

     if released
     {
         direction = point_direction(xprevious, yprevious, x, y);
         speed = point_distance(xprevious, yprevious, x, y);
         released = false;
         pressed = false;
     }
}