Algodoo

for scripting way, do:
goto consol by F11
type
scene.my.variable1=""
press esc
for disc holder on oncollide type in
(e)=>{scene.my.variable1 = e.other.text}
for the screens texture type in
{""+scene.my.variable1}
finally, for the discs, the text must be the name of a texture (maybe wood.png) changing it in appearence menu is fine. hope you didnt already do this...