Sentence 1: Joshua heard tapping at his bedroom window. 
 Sentence 3: He didn't see anything, and dropped the blinds 
 Sentence 4:  The tapping quickly started again 
 Sentence 5:  As Joshua slowly opened his blinds, he saw a cardinal eating seeds 
 Option 1: The breeze was blowing the branches of the tree against his window. 
 Option 2: He pulled the blinds aside, looking around.