The tool opens with a fraction snake made up of 6 blocks. You can drag any of the blocks from the snake and move them around the screen.
Clicking Set up opens a menu where you can change the number of blocks of the snake, and the colour of each block.
Clicking Reset undoes all changes you have made, returning the tool to its default state.
Are you sure?
Clicking Reset means that any changes you have made will be lost. Is that OK?
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