here's the first function:
for i = 1 to 99
if rttimer(i)<=0 `finds the first available rocket thrust object.
show object i+7500
position object i+7500,x#,y#,320
zrotate object i+7500,ang
here's the second:
function rthrust() 'lowers the timer for each thrust segment and
for i = 1 to 99 'gets rid of them when they're time is up.
hide object 7500+i
That's it. You may have to play with the size of your thrust objects and the speed of the rocket to make it look good.