First you lay the fabric out and add the dye.
Then you put a sheet of plastic on top.
You can manipulate the dye with the paint roller brush, blending more or less, to get a cool ombre effect.
Here is the finished fabric, under the plastic, heating up in the summer sun.
Colors; lemon yellow, deep yellow, amythest
Now that this layer is protected with plastic, you simply lay another piece of fabric on top and keep going. You can pile layer after layer using this method. I've had maybe 30+ layers in the past.
Since you are squeezing out dye around the edges of the table you have to watch your feet!