button_munch: 
    type: world 
    events: 
        on player enters blue_stand: 
            - if <player.inventory.contains.material[blue_wool]> { 
                - narrate "Bloo." 
            } 
        on player enters red_stand: 
            - if <player.inventory.contains.material[red_wool]> { 
                - narrate "Rehd." 
            } 
        on player enters green_stand: 
            - if <player.inventory.contains.material[green_wool]> { 
                - narrate "Grin." 
            } 
        on player enters white_stand: 
            - if <player.inventory.contains.material[white_wool]> { 
                - narrate "Wite." 
            }