This makes a smallish, square blanket of about 28" x 29". For a larger blanket consider larger needles or heavier weight yarn.
This is a charted design. I made the chart as large as I could on a single page, but you still may need to enlarge it. I've specified 14 stitch markers because I found it much easier to follow the chart in 10-stitch blocks.
I used two full balls of white yarn and slightly less than one full ball for each of the four colors.
The 4-part mirrored design is not included in the pattern. If you want to "create" it, it uses 2-mirrored repeats and 2 "regular" repeats of the chart.