const rules:boolean[][] = [
	[false, true,  false,  true,  true,  false,  true],
	[true,  false, true,  false,  true,  true,  true],
	[false,  true,  false, true,  true,  false,  true],
	[true,  false,  true,  false, true,  true,  true],
	[true,  false, true,  false, false, true,  false],
	[false,  true,  false,  true,  true,  false, true],
	[true,  false, true,  false, false,  true, false]
]

let previousChord:number = 0
let chords:number[] = []
for(let i:number = 0; i < 8; i++){
	const chord = Math.floor(Math.random()*7)
	if(rules[previousChord][chord]){
		chords.push(chord + 1)
		previousChord = chord
	} else {
		i--
	}
}
console.log(chords)