Algodoo

I've done it! Finally i have managed to create an engine that doesn't explode after about 3 seconds. its slow but i plan to improve it later.
it works by using scripting to alter the density of the pistons and uses gears to keep syncronised, press enter/return to start it.

comment,rate, and most importantly download. Give me credit if you use it in one of your scenes

how can i improve it? tell me in your comments

Have phun