i got 76% percentage coverage .i need to achieve 100% coverage. apex trigger
public static void afterupdate(List<opportunity> optylist,map<id,Opportunity> optyoldmap){
         Map<Id,Opportunity>mapopp= new Map<Id,Opportunity>();
         List<Project__c> projlist= new List<Project__c>();

         for(Opportunity opp:optylist){
            if ( opp.StageName != optyoldmap.get( opp.Id ).StageName && (opp.StageName=='closed won' || opp.stageName=='Closed Lost' )){
                mapopp.put(opp.id,opp);
            }
        }
        projlist=[Select Status__c ,Opportunity__c from Project__c where Opportunity__c in :mapopp.keyset()];
        
        if(projlist.size()>0){
            For(Project__c p:projlist ){
                if(mapopp.get( p.Opportunity__c ).StageName =='closed won')
                P.status__c='Active';
                if(mapopp.get( p.Opportunity__c ).StageName =='closed Lost')
                p.Status__c='Cancelled';
            }}
            update projlist;
       
        }
test class:
@isTest
public class update_projectHandlerTest {
public static testmethod void optyprojectTest(){
    list<opportunity> opty = new list<opportunity>();
    list<project__c>  proj  = new list<project__c>();
  
    opportunity op = new opportunity ();
    op.stagename = 'qualification';
    op.Name='test1';
    op.CloseDate = System.today();
    opty.add(op);
    insert opty;
        Project__c p1=new Project__c();
        p1.Status__c='Active';
        p1.opportunity__c=op.id;
        p1.Level_of_Effort__c='medium';
        proj.add(p1);
        insert proj;
    
     
       test.startTest();
     op.stagename = 'closedwon';
     update opty;
     p1.Status__c='Active';
     update proj;
     test.stopTest();
}}

thanks in advance.