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url: /flow/guide/scripting-reference/script-editor.md
---

# Script Editor

Throughout Flow where ever you need to enter script code you will be presented with the Script Editor window. Each script is attached to an Event (Refer [Events](/flow/guide/scripting-reference/events/)).

The map editor window has an integrated script editor, while having the same principal design it looks slightly different to the below image

![](/flow/images/script-editor.jpg)

The top half of the script editor is where you enter your script code. The line number will show at the left hand border. When you have finished entering your script you should test compile (right click and select `Test Compile`) and then click the `Save` button when satisfied.

The bottom half is the compiler messages section. This shows any messages regarding the compilation of the script code you entered. If there are errors with your script they will be shown here along with the line and character number.

### Syntax Highlighting

Script will be highlighted in different colours and boldness depending on what is being represented.

### Reading Error Messages

After the following script example is the error that will be returned along with a description on how to interpret the error.

```pascal
procedure ScriptEvent (var Value : variant);
begin
if Value<10 thne Value := 10;
end;
```

This would result in the error `Compiler: [Error] (3:13): 'THEN' expected`. As you can see there is a spelling mistake in the script code and the compiler is anticipating that it should be the word `then`. It also indicates the error occurred on the 3rd line starting at the 13th character

```pascal
procedure ScriptEvent (var Value : variant);
begin
whlie Value < 10 do Value := Value + 1;
end;
```

The above code results in the error `Compiler: [Error] (3:1): Unknown identifier 'whlie'.` In this case there is again a spelling mistake and the compiler does not recognise the word `while`. It also indicates the error occurred on the 3rd line starting at the 1st character