--CCLayer就是一幀圖層
ccLayer = CCLayerColor:create(ccc4(0, 0, 255, 255))
layerFarm:setVisible(true)
layerFarm:addChild(ccLayer)
ccc4是顏色RGBA格式, 0, 0, 255, 255是純藍
255, 0, 0, 255 純紅
0, 255, 0, 255 純綠
漸變背景
blue = ccc4(255, 0, 0, 255)
green = ccc4(0, 255, 0, 255)
gradiant = CCLayerGradient:create(blue, green)
layerFarm:setVisible(true)
layerFarm:addChild(gradiant)