untitled Haiku

a good start.....but with haiku, the challenge is to pour as much meaning into those 17 syllables as you can......so you might want to reconsider using the words "A, a, in, is"......just brainstorming here, but perhaps something along the lines of,

"Color's life study;/
reds, yellows and orange watch for/
master's arrival."

now I'm making assumptions about your intent, so forgive me if I'm way off......but I substituted "reds, yellows and orange" for autumn......and "color's" for "time" thereby referencing the master's eternal handiwork but also opening up the next line for the actual colors......and bringing the "master's arrival" back in the last line to wrap things up

and I offer this only as an example of what might be done within haiku....."and, for" still connect the pieces, but hopefully more prudently [did I just use the word prudently??]