b = 16
if (heartobj.x >= (x + sprite_width / 2 - b - 8))
    heartobj.x = x + sprite_width / 2 - b - 8
if (heartobj.x <= (x - sprite_width / 2 + b - 8))
    heartobj.x = x - sprite_width / 2 + b - 8
if (heartobj.y >= (y + sprite_height / 2 - b - 8))
    heartobj.y = y + sprite_height / 2 - b - 8
if (heartobj.y <= (y - sprite_height / 2 + b - 8))
    heartobj.y = y - sprite_height / 2 + b - 8