Hello, You need to uncheck the 'batch pen trails' on 'playfield options...' menu. I understand this problem comes from technical issue. But kids may confuse this behavior.

Best regards, Kazuhiro Abe

2007/10/8, SeungBum Kim picxenk@gmail.com:

Hi,

When I make a script like below,

Object forward by 10 Object turn by 90 Object forward by 10 Object turn by 90 Object forward by 10 Object turn by 90 Object forward by 10 Object turn by 90

or using "repeat tile"

Repeat 4 times Do Object forward by 10 Object turn by 90

then, click "!" button to run once. It doesn't make a square shape in the OLPC image. (of course with pen down)

Actually, I used that procedural eToys codes in 3.8 image for teaching L-system incrementally. What's wrong with OLPC eToys?