These are some of Louise's molas from her visits during this decade that I particularly love. I like these dizzy op art designs. They are my favorites.
blue diamonds
This is a two layer mola, black top over the blue foundation layer.
doubles
This three layer mola has a red top over a yellow middle layer and a black foundation layer.

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two guys
Another example of a three layer layer mola, similar to the upper right one with red over white over magenta.
cross plus
Three layers again, black over white over the red foundation layer.