A solution by edent (Time: 12.1s, Blocks used: +5)
A solution by cs allen (Time: 9.5s, Blocks used: +9)
A solution by Tuorum (Time: 23.5s, Blocks used: +6)
A solution by Uu (Time: 14.1s, Blocks used: +8)
A solution by Nn (Time: 25.6s, Blocks used: +10)
A solution by Just (Time: 14.5s, Blocks used: +11)