完成图
[flash=500,400]http://s1.knowsky.com/20131005/bfmhiq53imr592116826.jpg[/flash]
步骤
简单的说就是由浅入深，从明到暗。
[flash=500,400]http://s1.knowsky.com/20131005/wedq2m5zm32592116926.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/zamnnmfvzsq592117026.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/al2wmeygeez002117227.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/csgwauubvkt002117327.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/uhs2xjwvpwa002117527.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/zprcs0jdegw002117627.jpg[/flash]
[flash=500,400]http://s1.knowsky.com/20131005/04kdgeoa1wu002117827.jpg[/flash]