The script casts the spell 'plankmake' in the game,
Requirements: The Dream Mentor quest to be completed. The necessary runes or a runepouch in the player's inventory. The player also needs to ensure they have enough cash. Have filled their bank with bank slots, Be on lunar's spellbook. With the required wood and at least one plank in the bank.
At line 25, the player can choose the specific task they want to complete. The script supporting all types of planks and the use of a runepouch.