Other stimuli
-------------

The following stimulus types create drifting grating stimuli,

* adamk
* disk
* sos
* bar
* barnoise
* barpatmo
* barray
* bar2ran
* wy2pa
* grid
* noise
* dynedge
* pasupathy_shape
* image_set
* null


**barnoise**

Parameters:

* ``seed`` - randomization seed for bar pattern (left eye)

* ``seed_r`` - randomization seed for bar pattern (right eye).  This
  defaults to the same seed as the left eye, if it is not specified.