Sunshine of your love is a famous song from the 60s and 70s. The well known opening riff was the soundtrack for that time. Eric Clapton, guitarist for cream is also a famous guitarist, especially in the 60s and 70s.
here is how the main riff is played...
|-----------------------------------|
|-----------------------------------|
|-----------------------------------|
|--12-12-10-12----------------------|
|---------------12-11-10-----b8-----|
|-------------------------10----10--|
