I going to tell you a basic of squeak coding.
Shift + 6 = up arrow
Shift + - = left arrow (Not sure)
This symbols help you with Jens' "Make Up Block" As you wonder how it works. For me, it took a long time to solve them, symbol.
Hope it help you! Feel it help you on squeak!
--switenky
P.S.
If you don"t know what "squeak" means go to "www.squeak.org" P.S.S. Did you know scratch is made from squeak!
DIG DUGOffline