NUMBER_MOTOR'was not declared in this scope

AWOL:
I just put "muiltwii_2_1_mega2_0_gps" into Google, and got ONE result - this thread.

See what we're up against?

A simple loop; I would say my friend (stiff upper lip icon missing ]:smiley: )

while true;

will do
One could also specify it more specific as

labelĀ  http://arduino.cc/forum/index.php?action=post;topic=141566.15;num_replies=21#top
goto http://arduino.cc/forum/index.php?action=post;topic=141566.15;num_replies=21#top

That will keep the Arduino busy for a while 8)
rofl
Best regards
Jantje