Following the capture of the upper end of the folded paper will come down to the lower-left corner of the paper. Rolling smooth, wipe out, we will see that there is a diagonal line, and then comes another one!
To capture the upper right side of the paper folded down to tip the bottom left corner of the paper. Mangle and then we'll see how Lee came out with a diagonal up another line and then write.
Catch on the next ยมุ in the right side of the paper folded down to the bottom left corner of the paper. Iron smooth and spread out, we can see that with the diagonal occurs as one line.