Two plain major chords a whole step apart, cycling with no cadence in sight. The 2 chord's third is the key's #4 — one borrowed sparkle — and the pair floats like a film cue. Dreamy verses run on this.
movesthe key's 4 sharpens inside the 2 chord — light, not tensionsolo·singmajor scale with a #4 — that's Lydian; hit the #4 on the 2 chordon recordJane Says — Jane's Addiction (G ↔ A) · Man on the Moon — R.E.M. (C ↔ D)try itVamp 1 → 2 for a whole verse; save your 4s and 5s for the chorus.