How to turn the last step of the Rubik's Cube? (Only the last four corner blocks are left, just change the color of the same corner block. )

Each letter represents the six faces of the Rubik's cube, right R, left L, up U, down D, F, after B, 90 degrees clockwise, 90 degrees counterclockwise, 65,438+080 degrees clockwise, counterclockwise [2], 65,438+080 degrees counterclockwise, and counterclockwise ['2]. Introduce the basic formula (layer priority method): Step 1: Return the bottom edge (also called the bottom) and correctly restore the four bottom edges) Step 2: Reset the bottom corner (restore the four first corners of the Rubik's Cube): Formula 2- 1:(r u r') Formula 2-2: (f u f) Step 3: Reset the middle edge (restore the Rubik's Cube). U F) Step 4: Top edge position (also called top frame crossing, The color of the top surface of the top four sides is the same as the color of the top center block): Formula 4:f(r ur u') f' Step 5: Vertex position (the step of adjusting all the top colors of the four corners of the Rubik's cube to the top surface): Formula 5-1:r ur ur formula 5-2: u r u. The color is the same as the color of the center block of the corresponding surface) : Formula 6: Rb' r F2 r' b R2 Step 7: Return to the top edge (the color of the other side of the four top edges has been positioned to be the same as the color of the center block of the other four sides): Formula 7:(r u' r)(u r u r)(u r u r)÷ I wish you early success! ! I don't know exactly: http://www.mf100.org/beginner.htm.