Algodoo

You should use this simple script in combination with other things. I can always teach you new script's if you want erich. btw. An good script in the update section is:
(e)=>{
sim.running ? {
\ your script, like the growing size
} : {}
}
It makes the box(oro ther scripts) only grow/work while the simulation is running

ok, thanks for the idea

uumm... i don`t understand it, if i try to make your script in, the box does not grow anymore.

your onCollide script of the not-growing box should be :
(e)=>{
e.this.update = (e)=>{
sim.running ? {
e.this.size = e.this.size + [0.02, 0.02];
e.this.size(1) > 1000 ? {
e.this.density = 0
} : {}
} : {}
}
}

ok, thanks

jay, it works!