Centauri tree tutorial syntax

shortcut addr
link 16
action pc_pickaxe_wood
split_arrows 4 11 11
-icon_nature pc_gem_amethyst
 link 11
 icon_resource pc_drop_amethyst1
 split_arrows 2 10 14
 -shortcut x
 -shortcut x
-icon_nature pc_gem_ruby
 link 11
 icon_resource pc_drop_ruby1
 split_arrows 2 10 14
 -shortcut x
 -shortcut x
-icon_nature [pc_ore_tin pc_ore_copper pc_ore_iron pc_ore_silver pc_ore_gold]
 link 11
 icon_resource [pc_drop_tin pc_drop_copper pc_drop_iron pc_drop_silver pc_drop_gold]
 split_arrows 2 10 14
 -shortcut x
 -shortcut x
-icon_nature pc_ore_coal
 link 11
 icon_resource pc_drop_coal
 split_arrows 2 10 14
 -shortcut x
 -shortcut x
...