Warm up

R L R L R L R L R L R L R L R L
RRLL RRLL RRLL RRLL
RLLL RLLL RLLL RLLL
RRRR LLLL RRRR LLLL

RLRR LRLL RLRR LRLL
RLLR LRRL RLLR LRRL
RRLR LLRL RRLE LLRL
RLRL LRLR RLRL LRLR