Mr. Pine's Mixed-Up Signs

Mr. Pine made signs.

¿¿He made signs that said STOP.
He made signs that said GO.
He made signs that said FAST.
And signs that said SLOW.
When the signs in Little Town were old, the mayor said, "we need all new signs." Mr. Pine painted all new signs in one week. "I will put them up," he said. But he could not find his glasses. He put the signs up anyway.
The signs were all MIXED-UP! Little Town was all mixed-up! Where were Mr. Pine's glasses? Who had his glasses? How did our beloved, intrepid sign painter solve the problem of all those mixed-up signs?
¿#185 of 240 Reasons to Celebrate America! Time Magazine, July 11, 2016