Two Karas are to find the center between two tree. Initially, the two Karas are somewhere in between the trees facing randomly to the left or to the right (picture on first row below). At the end, the two Karas have to stand right in front of each other in the center (picture on second row below).

Additional task (medium)
The center should be marked with a cloverleaf (not two!). If there is an odd number of fields between the trees, the cloverleaf should be exactely in the center. If there is an even number of fields, the cloverleaf can be on either of the two center fields.