THESE ARE THE VARIABLES IN YOUR IMAGE TAG.
d=h/v (horizontal) or (vertical) 
(h=0 angle v=90 angle)

h= height or length (ex. 50)
whichever is less.
 
r=y/n reflected Yes or No 
(y=color 1 t0 color 2 to color 2 to color 1. n=color 1 to color 2.) 

s=255,0,0 (start color r,g,b) 

e=0,0,255 (end color r,g,b) 

THIS IS WHAT YOUR IMAGE TAG WILL LOOK LIKE.
<img src="OTF-Grad-Maker.php?d=v&h=50&r=y&s=0,0,69&e=0,153,255" width=250 height=50> 
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