If #1 enters the ball to the right side high post, it initiates the "Horns High/Low" trigger.
#1 sets a nail screen for #4
#5 looks to go high/low with #4
#1 pops
#5 passes to #1
#3 makes a v-cut to get open
#1 passes to #3
#4 sets a back screen for #5
#4 and #1 set a double staggered screen for #2