(define at
  (lambda (fix level)
    (if (list? fix)
      (for-each (lambda (q) (at q level)) fix)
      (set-intensity (find-fixture fixtures fix) level))))


(define find-fixture
  (lambda (fixtures name)
    (cond
      [(null? fixtures) #f]
      [(eq? (fixture-name (car fixtures)) name) (car fixtures)]
      [else (find-fixture (cdr fixtures) name)])))


(define find-fixture-class
  (lambda (fixture-classes name)
    (cond
      [(null? fixture-classes) #f]
      [(string-ci=? (fixture-class-name (car fixture-classes)) name) (car fixture-classes)]
      [else (find-fixture-class (cdr fixture-classes) name)])))


(define patch-many
  (lambda (fixcls prefix n universe start-addr)
    (letrec ([f (lambda (i)
                   (patch-fixture (symbol-append prefix (string->symbol (number->string i)))
                                  fixcls universe (+ start-addr (- i 1)))
                   (if (< i n)
                     (f (+ i 1))))])
      (if fixcls
        (f 1)
        (display "Fixture class not available\n")))))


(patch-many (find-fixture-class fixture-class-library "Generic dimmer") 'dim 48 0 1)
;(patch-many (find-fixture-class fixture-class-library "Robe Robin DL7S Profile Mode 1") 'mh 4 0 51)