ok then try this:

instead of this:
while (vec_dist(my.x,player.x)>8)
{
my.pan += time_step * 4;
wait(1);
} //way to avoid colision using.

put thiss:

while (1)
{
if(vec_dist(my.x,player.x)<8&&key_space)
break;
my.pan += time_step * 4;
wait(1);
} //way to avoid colision using.