Pattern "PxrSeExpr" "PxrSeExpr1"
		"float floatInput1" [0.5]  # outer rad
		"float floatInput2" [0.25] # inner rad
		"string expression"
		["d = dist(s-0.5,t-0.5,0, 0, 0, 0);\
		outer = (d < floatInput1) ? 1 : 0;\
		d = dist(s-0.5,t-0.5,0, 0, 0, 0);\
		inner = (d < floatInput2) ? 0 : 1;\
		resultF = outer * inner;\
		resultF\
		"]