on rightclick on sign:
	line 1 of the clicked block is "&1[Compression]"
	line 3 of the clicked block is "&4&l黒曜石圧縮"
	line 4 of the clicked block is "&a右クリック"
	if player has 64 Obsidian:
		give 1 Obsidian of fortune 1 named "黒曜石圧縮" to Player
		remove 64 Obsidian from player

on sign change:
	replace "&" with "§" in line 1
	replace "&" with "§" in line 2
	replace "&" with "§" in line 3
	replace "&" with "§" in line 4