first try

app.ts

@@ -0,0 +1,22 @@
+const rules:boolean[][] = [
+	[false, true,  true,  true,  true,  true,  true],
+	[true,  false, true,  true,  true,  true,  true],
+	[true,  true,  false, true,  true,  true,  true],
+	[true,  true,  true,  false, true,  true,  true],
+	[true,  false, true,  false, false, true,  true],
+	[true,  true,  true,  true,  true,  false, true],
+	[true,  false, true,  false, true,  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)