def clear(len,height):
	l = length/2
	h = height/2
	for i in range(-len,len):
		for n in range(-len,len):
			for v in range(-height,height):
				mc.setBlock(x+n,y+v,z+i,0)

def terrainGen(len,wid):
	blocktypes=[3]
	clear(len,wid)
	for i in range(-len,len):
		for n in range(-len,len):
			for v in range(-height,height):
				if v >=0 AND v<=5:
					blocktypes.append(2)
					mc.setBlock(x+n,y+v,z+i,random.choice(blocktypes))
				elif v >=-10 AND v <=0:
					blocktypes.append(2)
					blocktypes.append(4)
					mc.setBlock(x+n,y+v,z+i,random.choice(blocktypes))
				elif v >=-20 AND v <=-10:
					blocktypes.append(2, 4, 1)
					mc.setBlock(x+n, y+v, z+o, random.choice(blocktypes))
				elif v >=-30 AND v<=-20:
					blocktypes.append(2, 4, 1, 48)
					mc.setBlock(x+n, y+v, z+o, random.choice(blocktypes))
				else: blocktypes.append(2, 4, 1, 48, 82)
					mc.setBlock(x+n, y+v, z+o, random.choice(blocktypes))