In Lord of the Flies, what does the Lord of the Flies tell Simon to do?

From the text:

"You are a silly little boy," said the Lord of the Flies, "just an ignorant, silly little boy."
Simon moved his swollen tongue but said nothing.
"Don't you agree?" said the Lord of the Flies. "Aren't you just a silly little boy?"
Simon answered him in the same silent voice.
"Well then," said the Lord of the Flies, "you'd better run off and play with the others. They think you're batty. You don't want Ralph to think you're batty, do you? You like Ralph a lot, don't you? And Piggy, and Jack?"