The Events and Control category in Scratch is used to manage the flow and logic of a program. It includes blocks that respond to events, make decisions, and control the program’s execution. Here’s a breakdown of the usage of the Events and Control category:
Events:
- Trigger blocks: These blocks respond to specific events, such as:
- Mouse clicks or movements
- Keyboard input
- Sensor inputs (e.g., touch, sound, or motion)
- Broadcasts from other sprites
- When blocks: These blocks trigger scripts when a specific event occurs, such as “When Green Flag Clicked” or “When Space Key Pressed”.
Control:
- Conditional blocks: These blocks make decisions based on conditions, such as:
- If-then blocks (e.g., “If touching color red, then… “)
- If-else blocks (e.g., “If score > 10, then… else… “)
- Loop blocks: These blocks repeat scripts multiple times, such as:
- Forever blocks (e.g., “Forever, move 10 steps”)
- Repeat blocks (e.g., “Repeat 5 times, play sound”)
- Broadcast blocks: These blocks send messages to other sprites, triggering scripts, such as:
- Broadcast blocks (e.g., “Broadcast ‘start game'”)
- Stop blocks: These blocks halt the program or a specific script, such as:
- Stop blocks (e.g., “Stop all”)
Usage examples:
- Creating a game that responds to user input (e.g., mouse clicks or keyboard input)
- Building an interactive story with conditional logic (e.g., “If user chooses option A, then… “)
- Developing a simulation that repeats actions (e.g., a ball bouncing forever)
- Designing a program that communicates with other sprites or scripts (e.g., broadcasting a message to start a game)
By using the Events and Control category, you can create dynamic, interactive, and responsive programs in Scratch!