What is the plot of The Scarlet Ibis in the form of a plot diagram?

A scarlet Ibis dies on their house and Doodle and his brother plan to go bury it. Doodle's brother resents that Doodle is such a slow learner. He is mad at Doodle for not being 'normal.' His hatred for Doodle's disability takes over and he runs away when Doodle cries for help, thinking Doodle will catch up. But Doodle never does catch up, and the brother finds him huddled under a red tree dead.