player p height 98 width 196 block t white boring ▓▓▓▓▓ ▓▓▓▓▓ ▓t▓w▓ ▓▓▓▓▓ ▓▓▓▓▓ block w white interesting ▓ ▓ ▓ g G ▓ ▓ ▓ ▓ = p ▓ ▓ ▓ ▓▓▓▓▓ ▓ ▓▓ε▓▓▓▓ link G g green link H g green block g green interesting ▓ epsilon ε g green 4 1 --- 3 ▓H ▓▓ 2 block p magenta boring ▓▓▓▓▓ ▓ ▓ ▓ ▓▓▓▓▓ ▓▓▓▓▓ ▓▓▓▓▓ block 1 blue boring ▓ block 2 blue boring ▓ block 3 blue boring ▓ block 4 blue boring ▓