A solution by Žisek (Time: 3.2s, Blocks used: +49)
A solution by mw (Time: 3.1s, Blocks used: +35)
A solution by mw (Time: 3.1s, Blocks used: +26)
A solution by kitty (Time: 5.6s, Blocks used: +64)
A solution by Yru (Time: 4.0s, Blocks used: +44)