The Napier flag is a red triangle on a white square. It suggests the letter N.

We create an array of points - this represents the polygon that gets filled. The variable tri represents three Points, each Point has two numbers, the x and y values.

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To complete the flag of the Bahamas you must add the black triangle which represents the unity and vigour of the people.

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We need to four triangle to draw the flag of Jamaica. If we get it right we will leave a yellow cross.

Each triangle must be given a different name - you can choose your own names or call them ttri, btri, ltri and rtri (for top, bottom, left and right).

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The Seychelles has a cheerful flag; four triangles and a quadrilateral.

We tire of coming up with names for our polygons. Our flagging imagination can produce nothing better than p1 and p2.

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