A=your only friend B=Heartache C=Edgy D=Bonetrosle E=Spears of agony F=Metal crusher G=Death by pain H=Asgore I=Your best dream J=Final heaven K=algra L=mopes and despair M=but she refuse to let the earth live+battle of the true villain N=launching lazes at you O=M.E.G.A.L.O.V.A.N.I.A.
credit to GamerMusician for the songs, Toby Fox for Undertale, the creator of Underfell, and me for looping the songs and using some other blocks.