Simplify the following text for a Grade 4 native English-speaking person.
Original: During the twelve days while Troy mourns Hector 's death , the Greeks plan to enter the city using a hollowed-out wooden horse , devised by Odysseus , desperate to stem the slaughter of his own men at the hands of the Trojans . The Greeks leave the horse at their camp , then depart , hiding their ships in a nearby cove .
Simplified: After Hector 's death , the Greeks make a plan to come into Troy using a wooden horse .