Coding Sequences: Instructions in Order

A sequence is a set of instructions carried out one after another in a specific order. In coding, the computer follows each step exactly as it is written — it never skips ahead or goes back unless you tell it to. Getting the order right is one of the most important skills in programming.

Why Order Matters

Imagine making a sandwich: you have to get the bread BEFORE you add the filling. If you put the filling down first with no bread underneath, the sandwich does not work. Code is exactly the same — each block must come in the right place for the program to do what you want.

• Computers execute blocks from top to bottom, one at a time.
• A wrong order can make the sprite do something unexpected — or do nothing at all.
• Reading your sequence aloud like a recipe helps you spot missing or misplaced steps.
• Debugging is the process of finding and fixing steps that are in the wrong order.

A Coding Sequence in Five Steps

1. Define the problem — decide exactly what you want the program to do.
2. Plan the steps — write or draw the actions in the order they need to happen.
3. Write the code — drag the Scratch blocks into the correct sequence.
4. Test the program — click the green flag and watch what happens.
5. Debug if needed — find any block that is in the wrong place and fix it.