Select two different color Blendy Pens and place the pen tips into the "color fusion chamber" so that the tips face each other. Push the tips of the Blendy Pen all the way into the chamber until you hear a click.
Hold the Blendy Pens up vertically with the main color you want to use at the bottom of the fusion chamber.
Twist both Blendy Pens in opposite directions according to the arrows marked "twist" on the color fusion chamber. Hold the pens in place for five seconds after twisting.
Remove the bottom Blendy Pen from the color fusion chamber, which will be charged with color from the top pen.
Apply the blended colors from the bottom Blendy Pen onto the paper using a side-to-side coloring motion to release the blended colors until the ink returns to the original color.