Ewing added: “The rocks don’t appear to have struck anyone – it was an exercise to flush out the Himshie group to invoke a reaction and it did so.”
Amid the confrontation between the two groups, Stewart was stated to be “jumping back and forward” and was “ready for a fight.”
He was also said to have looked at Moy “aggressively” after the stabbing by Turley and said he deserved it.
There was also mention of footage showing the trio running down a road minutes after the attack.
The advocate depute said the accused were seen shaking hands with Turley and embracing him.
It was stated the three teenagers took a taxi from Irvine back to East Kilbride, before entering the home of 19-year-old Fraser Wallace, who was friendly with Turley.
Ewing claimed that the duo on trial – as well as Turley – asked Wallace if Moy had died.
The advocate depute said that on receiving information Moy was still alive at the time, the group started singing a song about him, with lyrics including “Kayden bop” as Stewart and the 15-year-old touched their stomach and leg.
He said reference was also made to the victim being “cheffed up.”