"How can we get to the bank?". asked one naughty Grumpy.
"We have to follow a line, but I don't know which color", said another.
"Oh, I know the way", said a smarty Grumpy. "It's the blue line we must follow." And he was quite right.
So they planned that just when the moon came over the tall trees in the entrance to the dark woods, they would start.