So I have this bit of code:

```
Points = [ [400,100],[600,100],[800,100] , [300,300],[400,300],[500,300],[600,300] ,         [200,500],[400,500],[600,500],[800,500],[1000,500] , [300,700],[500,700][700,700][900,700] , [200,900],[400,900],[600,900] ]

```

And it produces this Error:

```
  line 43, in <module>
    Points = [ [400,100],[600,100],[800,100] , [300,300],[400,300],[500,300],[600,300] , [200,500],[400,500],[600,500],[800,500],[1000,500] , [300,700],[500,700][700,700][900,700] , [200,900],[400,900],[600,900] ]
TypeError: list indices must be integers, not tuple

```

What can I do to fix it?