Subdivide option a few times to create multiple divisions.
You will see additional options at the Material tab when you select any
object and go to Edit Mode. Right bellow your indexes selector, you will
see buttons for Assign, Select, and Deselect (Figure 5.28).
Figure 5.28 - Material tab in Edit Mode
For instance, if you can create a new material and assign "Red" as
name. Pick the Diffuse BSDF as a shader and make it display a red
color. By default, a single material applies to the entire object, and you
don't have to do anything else if you only need that one material (Figure
5.29).