If you are working on a real design, I can help you troubleshoot specific steps: Are your chains not closing?
Elias uploaded the G-code to his router. He clamped the cherry wood tight and hit "Cycle Start." Mastercam X2 Art Tutorial
He selected a 3D Roughing toolpath with a 1/4" ball nose end mill. This would strip away the bulk of the wood, leaving a "stair-step" version of his art. If you are working on a real design,
Using the Art Create Shape tool, he selected the hawk’s silhouette. Mastercam X2 Art Tutorial
He used the Add Boss function to layer the Celtic knot over the hawk’s wing.