Sow and Reap

There is a story about a Massachusetts Institute of Technology (MIT) student who spent one entire summer walking 2 miles to the Harvard football stadium and 2 miles back each day. He wore a black and white striped shirt and when he reached the stadium he acted still more strangely. The young man walked up and down the field for about fifteen minutes throwing birdseed all over the place while blowing a whistle.

What was he doing? Want to guess?