The song “Red Barchetta” from the band Rush starts with a melody that is played completely with what are called natural harmonics. A natural harmonic is produced when you lightly touch a guitar string at a specific point and pluck the string. You are not going to press the strings down against the fretboard like you do when you normally play a note. Instead you are just touching the string.
For more on how to play natural harmonics check out this guitar lesson. Natural Harmonics on the Guitar
(Video Guitar Lesson)
“Red Barchetta” Intro – Guitar Tablature
Here is the guitar tablature for the intro to “Red Barchetta” from Rush. The diamonds around the numbers indicated the harmonics. So you will just lightly touch your finger at those frets and pick the string.
“Red Barchetta” – Rush Live
Here is a little inspiration for you. This is Rush playing “Red Barchetta” live in 1980.