Laser Diffraction Experiment

We are working with four different patterns. The left 2 patterns consist of vertical lines and the right 2 pattern consist of horizontal lines. When the laser projected through the patterns, we saw something like this:

(This is not to scale)

The lasers were placed 1 m away from a sheet a paper.

Red laser:

The top two patterns created a line of dots 1 cm apart and the bottom two patterns created a line of dots 1.5 cm apart.

Green laser:

The top two patterns created a line of dots 1 cm apart and the bottom two patterns created a line of dots 1.25 cm apart.

Therefore the distance between the top pattern's lines are 160 nm and 60 nm thick.

And the  distance between the top pattern's lines are 130 nm and 60 nm thick.