挖一個(gè)長(zhǎng)寬高為5X5X5的坑,一個(gè)角放加號(hào)標(biāo)志器,上方去除一格放加號(hào)滑動(dòng)器,對(duì)著加號(hào)滑動(dòng)器放一個(gè)減號(hào)標(biāo)志器,用方塊擺出臺(tái)階造型,再上方加號(hào)滑動(dòng)器上放開關(guān)就好啦~