Draw basic pattern with the area for the weft yarn

I. Draw basic pattern:

    1
    Select yarn color #3 from the Yarn Color table.
    2
    Exchange yarn color #31 to yarn color #3 (basic)
    3
    Draw the pattern area for the selective insert of weft yarn with yarn color #2 and #31:

Draw yarn color #2 to the outer edge of the area for the selective weft yarn. With any desired stepping.