Parodied with a fictional and very unsubtle children's story in Bo Burnham's stand-up act:
The squares lived happily in their square houses, in their square yards, in their square town.
But then, one day, a family of circles moved in from the west.
"Get out of here, roundies!" shouted one of the squares.
"Why?" said one of the circles.
"Because this is a metaphor for racism!"