Complex sentence: Milo refuses to join Jules and Maddie and waits for them at the front of the tree market, while the girls are searching for the tree Milo gets into a fight with an orphaned boy and they cause a ruckus within the square.
Split into simpler sentences: Milo refuses to join Jules and Maddie and waits for them at the front of the tree market. While the girls are searching for the tree, Milo gets into a fight with an orphaned boy and they cause a ruckus within the square.