Mania Warp Effect

/// Create Event:

    ShapeSize = 0;

/// Step Event:

    if(ShapeSize < 320) // Change 320 to your screen size, use the same value below but increase it by 1.

    {

       ShapeSize += (321-ShapeSize)*0.05 // Change 0.05 if it's too slow or fast.

     }

/// Draw Event:

    draw_set_blend_mode_ext(bm_inv_dest_color,bm_zero)

    draw_set_color(c_white)

    draw_circle(par_character.x, par_character.y, ShapeSize, false); // Change position, obviously.

    draw_set_blend_mode(bm_normal);