: Built on a simple G-minor blues scale played in parallel fourths, Ritchie Blackmore’s creation is perhaps the most recognizable riff in history—and famously one of the forbidden riffs often banned in guitar stores due to overuse by beginners.
In the 1970s, riffs became heavier and more complex, serving as the central "hook" for stadium-sized anthems. 100_greatest_guitar_riffs_of_all_time_part_1
The 10 Hardest Guitar Solos To Learn In Our Humble Opinion - Taaqademy : Built on a simple G-minor blues scale