2）双击计算按钮，切换到Actions选项卡，里面的程序为：
On (Press, Key: )
Set Variable: "determinant" = (b*b)-(4*a*c)
If (determinant<0)
Begin Tell Target ("wujie")
Go to and Play (2)
End Tell Target
Else
Set Variable: "n1" = 1
Set Variable: "loop1" = 0
Loop While (loop1<100)
Set Variable: "n1" = n1-(n1*n1-determinant)/(2*n1)
Set Variable: "loop1" = loop1+1
End Loop
Set Variable: "top" = -(b)+n1
Set Variable: "finish" = top/(2*a)
Set Variable: "x1" = finish
Set Variable: "n2" = 1
Set Variable: "loop2" = 0
Loop While (loop2<100)
Set Variable: "n2" = n2-(n2*n2-determinant)/(2*n2)
Set Variable: "loop2" = loop2+1
End Loop
Set Variable: "top1" = -(b)-n2
Set Variable: "finish1" = top1/(2*a)
Set Variable: "x2" = finish1
End If
End On
表示如（b*b-4*ac）大于0，则计算两个根，并分别在X1和X2文本框中输出，如小于0，则从第2帧开始播放实体名称为“wujie”的电影。
3）界面上的小圆圈即为实体名称为“wujie”的Movie Clip，用鼠标右键点击它，在弹出的菜单中选择Edit项，