1. Scratch Syntax: Part 2 CMP

2. Variables In programming, a variable is a placeholder for some value, much like x and y are popular variables in algebra. In Scratch, variables are represented with blocks shaped like elongated circles, uniquely labeled by you.

3. Threads In programming, a thread is like a mini-program within a program that can execute at the same time as other threads. In Scratch, any block whose label begins with "when" essentially demarks the start of a thread.

4. Events An event is a signal from one thread to another. Blocks whose labels begin with "broadcast" signal events whereas blocks whose labels begin with "when" handle events.

5. Events An event is a signal from one thread to another. Blocks whose labels begin with "broadcast" signal events whereas blocks whose labels begin with "when" handle events.

6. Simple Games Simple games use threads and events to create new levels.

7. Copter Game—One Level

8. Homework Complete the Simple Game Project Completed projects need to be submitted via email by the due date.