Build an XML string that contains some randomly positioned goal items

def getItemXML():
    ''' Build an XML string that contains some randomly positioned goal items'''
    xml=""
    for item in range(NUM_GOALS):
        x = str(random.randint(old_div(-ARENA_WIDTH,2),old_div(ARENA_WIDTH,2)))
        z = str(random.randint(old_div(-ARENA_BREADTH,2),old_div(ARENA_BREADTH,2)))
        xml += '''<DrawItem x="''' + x + '''" y="210" z="''' + z + '''" type="''' + GOAL_TYPE + '''"/>'''
    return xml