Gen 4:6-7
6 GOD spoke to Cain: "Why this tantrum? Why the sulking? 7 If you do well, won't you be accepted? And if you don't do well, sin is lying in wait for you, ready to pounce; it's out to get you, you've got to master it."

In other words: you can become eye candy and win! Isn't that what God said? NO!