---

def calculateMove():
    global x
    global y
    global z

    currentHeight = mc.getHeight(x, y) - 1
    forwardHeight = mc.getHeight(x + 1, z)
    rightHeight = mc.getHeight(x, z + 1)
    backHeight = mc.getHeight(x - 1, z)
    leftHeight = mc.getHeight(x, z - 1)
    if forwardHeight - currentHeight < 3:
        x += 1
    elif rightHeight - currentHeight < 3:
        z += 1
    elif leftHeight - currentHeight < 3:
        z -= 1
    elif backHeight - currentHeight < 3:
        x -= 1