In part 1 of this tutorial, Jon starts with a toned canvas. He then takes some Burnt Sienna that has been thinned down with paint thinner and begins to lay out his composition. He divides his composition into thirds. The rule of thirds is a popular compositional guideline that artists follow to ensure they have an interesting composition. It ensures that your composition will not be divided in half, which is a big no no in painting. Jon then begins to block in the sky. He starts at the horizon with a mixture of Burnt Sienna, Blue and a touch of red.