Use the following blocks, under "Control" to control how your game starts, ends, and changes:

• "broadcast" (create new message by clicking on the arrow)
• "when I receive" (choose which message by clicking on the arrow)

Use these to:

• Make a transition from the start screen to the gameplay
• Change the actions of one or more sprites based on an event that happens during gameplay
• Show a different background based on an event that happens in the gameplay (if the player wins or loses, for example)