the module The module is based on a square grid. In a field of 4x4 one square was removed - the remaining 15 pieces were cut into 3 modules of the same shape.
 
    see how many different patterns possible:
   
funnel

square grid
   
zigzag-funnel

white stars 1
   
white stars 2

wickerwork
   
triangular grid

crowd
   
stripe

crystal
   
snow tyre