A solution by cs allen (Time: 3.2s, Blocks used: +9)
A solution by Uu (Time: 2.5s, Blocks used: +40)
A solution by Läubi (Time: 2.5s, Blocks used: +12)
A solution by Just.. (Time: 3.2s, Blocks used: +13)
A solution by 好人 (Time: 4.4s, Blocks used: +23)
A solution by L3S (Time: 3.0s, Blocks used: +7)
A solution by J (Time: 3.4s, Blocks used: +21)
A solution by Dan (Time: 2.2s, Blocks used: +6)