alien1Speed=4
x=irandom_range(0,room_width)
y=irandom_range(0,room_height)
if collision_circle(x,y,100,Obj_Humman,false,true)
{
instance_create_layer(x=irandom_range(0,room_width),y=irandom_range(0,room_height),layer,obj_Alien1);
instance_destroy()
}