Many years back i installed an app from the Play Store from which i learned algorithms to solve the 3x3 cube , when I stopped solving cube for many years i forgot some algorithms , the last layer (PLL) had this one formula which solved every case by continuously applying that one formula , I can't remember that formula just it ig started with R' F and had 2 B ( back ) simultaneously ( like the headlight pattern was kept at the back and then apply then this formula was applied , same with the headlight which had the middle piece solved and it also solve when there are no headlight ) ( I don't know in the middle or just after 2 moves ) please help me if someone knows this , i searched every possible yt video but didn't got what I was looking for !!!!! Thank you