条件触发时的颜色背景直到另一个触发

Question

我在一个指示灯上画绿色点。当所有的点都变成绿色的时候，我希望背景变成绿色。背景应该保持绿色(这样一个或更多的点可以变成红色)，直到所有的点变成红色。然后，我希望背景变成红色，直到所有的点再次变成绿色。

现在我有一个：

bull = (ha_diff==2 and ha_diff2==2 and ha_diff3==2 and ha_diff4==2 and ha_diff5==2 and ha_diff6==2 and ha_diff7==2 and ha_diff8==2 )
bear = (ha_diff==1 and ha_diff2==1 and ha_diff3==1 and ha_diff4==1 and ha_diff5==1 and ha_diff6==1  and ha_diff7==1 and ha_diff8==1 )

plot(15, title="TF1", color=iff(ha_diff==1, red, iff(ha_diff==2, green, white)), style=circles, linewidth=5, join=true)
plot(14, title="TF2", color=iff(ha_diff2==1, red, iff(ha_diff2==2, green, white)), style=circles, linewidth=5, join=true)
plot(13, title="TF3", color=iff(ha_diff3==1, red, iff(ha_diff3==2, green, white)), style=circles, linewidth=5, join=true)
plot(12, title="TF4", color=iff(ha_diff4==1, red, iff(ha_diff4==2, green, white)), style=circles, linewidth=5, join=true)
plot(11, title="TF5", color=iff(ha_diff5==1, red, iff(ha_diff5==2, green, white)), style=circles, linewidth=5, join=true)
plot(10, title="TF6", color=iff(ha_diff6==1, red, iff(ha_diff6==2, green, white)), style=circles, linewidth=5, join=true)
plot(9, title="TF7", color=iff(ha_diff7==1, red, iff(ha_diff7==2, green, white)), style=circles, linewidth=5, join=true)
plot(8, title="TF8", color=iff(ha_diff8==1, red, iff(ha_diff8==2, green, white)), style=circles, linewidth=5, join=true)


// Colour background
backgroundColour = (bull) ? green : red

bgcolor(color=backgroundColour, transp=40,
     title="Conditionally coloured background")

但这样做的原因是，只有当所有的点都是绿色的时候，它才会把背景涂成绿色。只要一个点变成红色，它就会涂成红色，并且应该继续涂绿色直到所有的点都变成红色。

有人能帮忙吗？

Answer 1

如下面的示例所示，只有当公牛/熊市信号触发器触发时，才为backgroundColour变量分配颜色，否则使用前面的值：

// Colour background
backgroundColour = white
backgroundColour := bull ? green : bear ? red : backgroundColour[1]

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