Computer Science - Block-Based Programming - Events and control flow - Events, Conditions, and Control

4-step lesson. Step 1: 'Events (yellow blocks, hat-shaped): These START scripts. One script per event hat. Types: green flag, key press, sprite click, backdrop change, message received. Without an event block on top, a script never runs!' Step 2: 'Control blocks (orange): IF/THEN: check a condition,