action ball_drop()
{
while (key_space == 0) {wait (1);}
phent_settype(my, PH_Rigid, PH_box);
phent_setmass (my, 2, PH_box);
ph_setgravity (earthgravity);
phent_addvelcentral(my, vector(0, -472 * cos(launch_angle) , 472 * sin(launch_angle) ) );
function missile_flying();
wait(1);
}

function missile_flying();

missile_flying();