Two squares share a vertex at the origin and have their sides along the x- and y-axis. Two vertices lie on the line satisfying x+2y=c. What is the proportion purple : yellow?
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Solution
The proportion purple : yellow is 9 : 1.

Poem
Below the line
Can be fine
Or sometimes
Between mad and fine
Between opposite and limit
There is a boundary line
Made for those who want to cross
They need beauty to survive
Below the line
They know there is no passion
For their transformation
And not to spoil their actions