player p block w white interesting ▓▓▓▓▓▓▓ ▓ p ▓ ▓ G H ▓ ▓ ▓ ▓ -▓ ▓▓▓g▓=▓ ▓▓▓▓▓▓▓ link G g green link H g green block g green interesting ▓ ▓▓ epsilon ε g green b ▓ block p magenta boring ▓▓▓▓▓ ▓ ▓ ▓ ▓▓▓▓▓ ▓▓▓▓▓ ▓▓▓▓▓ block b blue interesting ▓▓▓ ▓ ▓ ▓