Over-under-over weaving

Weaving is the interlacing of vertical warp threads and horizontal weft threads. 
First you push the weaver thread under the first strip.  Lift it  over the second warp strip. Continue pushing the weft under the third strip,  over the fourth and so on, until it reaches across the loom.
Then, slide it  over the first warp and  under the second warp.  Continue  over the third,  under the fourth, and so on across the row.
The pattern should look like a checkerboard.