B:Nostalgia Nerd | Spectrum Sunrise Patterns (BASIC Program) | Nostalgia Nerd Extra @BNostalgiaNerd | Uploaded June 2016 | Updated October 2024, 2 hours ago.
One BASIC program that stands out from my ZX Spectrum youth was this Sunrise program written out from the Sinclair ZX Spectrum user guide by Dorling Kindersley Ltd.

Something about the sound and the varied colour and density of the patterns which I loved.

Included here is the BASIC code and a demonstration of said code.