#N Cloverleaf interchange
#O Adam P. Goucher
#C http://conwaylife.com/wiki/Cloverleaf_interchange
#C http://conwaylife.com/patterns/cloverleafinterchange.rle
x = 13, y = 13, rule = B3/S23
4bo3bo$3bobobobo$3bobobobo$b2o2bobo2b2o$o4bobo4bo$b4o3b4o2$b4o3b4o$o4b
obo4bo$b2o2bobo2b2o$3bobobobo$3bobobobo$4bo3bo!