on form:
	event-block is cobble stone
	chance of 1%:
		set event-block to emerald ore
	chance of 5%:
		set event-block to redstone ore
	chance of 3%:
		set event-block to lapis ore
	chance of 14%:
		set event-block to coal ore
    chance of 10%:
        set event-block to iron ore
	chance of 7%:
		set event-block to gold ore
	chance of 1%:
		set event-block to diamond ore