What was Stalin relationship with Trotsky?

Lenin was a great political leader working for the greater good of the workers of Russia, and Stalin was an autocratic dictator who exploited Russia's workers for his own good.

The relationship between them was that Stalin worked under Lenin, and when Lenin died, and Stalin seized power over Russia, even though Lenin had specifically stated that Trotsky should succeed him, Stalin tried to associate himself with the well loved Lenin in order to create an image of himself that differed from his true anti-Marxist intentions.