Airplane, blowing through a big tube, trombone
This sentence contains a coordinating conjunction.
I'm a bit confused by the word you capitalized because the word "at" is neither a subordinating nor a coordinating conjunction. It is a preposition.
However, the word "but" is a coordinating conjunction, linking two independent clauses together.
Then she tells him her plan: while Duncan sleeps, she will give his chamberlains wine to make them drunk, and then she and Macbeth can slip in and murder Duncan. They will smear the blood of Duncan on the sleeping chamberlains to cast the guilt upon them.
