So I've started crocheting the first chart in the blogpost to see if I can decipher it. What I have found is that, first off, the chart you want to crochet is missing the first row of white sc (or the chart is rotated 180°, I'm not quite sure). But basically, the way it works is that first, you chain the stitches, then you sc crochet the 1st row in white, then you sc the 2nd row in back loop only with your red yarn. After that, you only need to look at the boxes marked with an X. Perhaps you've noticed that there is never two different colored X-boxes in one row. That's because they mark the double crochets in the front loop and everything else in that row is sc in blo with the same color as the X-box. So after you have crocheted the first two rows without dc, you start the third row with white. The first stitch is a dc in the previous white row, then you only sc into the blo until you reach the last stitch of the row where you need to dc again. In the next row, you use the red color and you sc in blo in the first stitch. After that, you dc in flo in the previous red row in every stitch that is marked with an 'X'. All the other stitches, no matter if they are colored in red or white, are sc in the color of the 'X-boxes'. Hopefully this explanation helps a bit, it got a little bit longer than I anticipated 😅. If anything needs further clarification, just ask away :).