Now that we have created a coloured planar graph lets try to play with it. We know because of the four-colour-theorem, that there is a colouring with only 4 colours possible.[br]Follow the instruction at the bottom of the site.

1) Try to colour the graph without using cyan.[br]- Select the colour and then a point to change its colour.[br]- You must not colour two adjacent vertices in the same colour[br]2) Check your result