public class zillowLeadFollowup
{
	
	public void onAfterInsert(List<JungoLeadsFrc__JungoLeads__c> lstNewLead)
	{
		sendAlertAfter6pmBefore9am(lstNewLead);	
	}

	private void sendAlertAfter6pmBefore9am(List<JungoLeadsFrc__JungoLeads__c> lstNewLead)
	{
		List<Messaging.SingleEmailMessage> lstMail = new List<Messaging.SingleEmailMessage>();
		List<JungoLeadsFrc__JungoLeads__c> lstLeadToUpdate = new List<JungoLeadsFrc__JungoLeads__c>();
		List<Task> lstTaskToInsert = new List<task>();
		
		for(JungoLeadsFrc__JungoLeads__c objLead: lstNewLead)
		{
			if(objLead.JungoLeadsFrc__Zillow_Recipient_Email__c != null) 
			{
				/* 1. We should never hardcode Ids; because in production Ids may not be same unless it is full copy sandbox.
				You can query owner Id based on User name(or as per your condition) before this for loop and assign ownerId dynamically here
				Let me know on which basis you want to assign ownerId, so that I can modify the code later
				
				2. We should never do DML operations inside a loop, instead keep a list, add the instance into list and update the list outside for loop.
				I will share you apex commandaments link below.
				*/
				lstLeadToUpdate.add(new JungoLeadsFrc__JungoLeads__c(Id = objLead.Id, OwnerId = '000000000000', JungoLeadsFrc__Stage__c = 'New',
																	JungoLeadsFrc__LeadSource__c = 'Zillow'));
				
				// Step 1: Create a new Email
				Messaging.SingleEmailMessage objMail = new Messaging.SingleEmailMessage();
				List<String> lstSendTo = new List<String>(); 
				List<String> lstCcTo = new List<String>();
				List<String> lstSendBcc = new List<String>();
				
				// I assume you want to send email to the leads created after 6pm and before 9am
				if(objLead.CreatedDate.hour() >= 18 || objLead.CreatedDate.hour() <= 8 )
				{
					
					  // Step 2: Set list of people who should get the email
					  lstSendTo.add(objLead.JungoLeadsFrc__Zillow_Recipient_Email__c);
					  objMail.setToAddresses(lstSendTo);
					
					  // Step 3: Set who the email is sent from
					  //objMail.setReplyTo('nayana@test.com');
					  objMail.setReplyTo('REPLACE_WITH_VALID_EMAIL_HERE');
					  objMail.setSenderDisplayName('Bryan Cerrati');
					
					  // (Optional) Set list of people who should be CC'ed
					  lstCcTo.add('REPLACE_WITH_VALID_EMAIL_HERE');
					  objMail.setCcAddresses(lstCcTo);

					  // Step 4. Set email contents - you can use variables!
					  objMail.setSubject('Specific Message');
					  // frame body message with valid message
					  String body = 'Dear ' + objLead.LastName + ', ';
					  body += 'I confess this will come as a surprise to you.';
					  body += 'I am John Alliston CEO of the Bank of Nigeria.';
					  body += 'I write to request your cooperation in this ';
					  body += 'urgent matter as I need a foreign partner ';
					  body += 'in the assistance of transferring $47,110,000 ';
					  body += 'to a US bank account. Please respond with ';
					  body += 'your bank account # so I may deposit these funds.';
					  objMail.setHtmlBody(body);
					
					  // Step 5. Add your email to the master list
					  mails.add(objMail); 
					  
					  /*Task: After Hours ALERT (Any specific reason for hardcoding 000000000 id in WhoId? 
					  I am not familiar with this '0000000000' id. Best practice is not to hardcode id )**/
					  lstTaskToInsert.add(new Task(Subject = 'Lead Revieved After Hours!', 
													Priority = 'High', 
													Status = 'Not Started', 
													IsReminderSet = true, 
													ReminderDateTime = System.today() + 1, 
													Description = 'Call Lead Immediatly, Lead Created at ' + objLead.CreatedDate + ' by the name of ' 
													+ objLead.JungoLeadsFrc__Firstname__c + ' ' + objLead.JungoLeadsFrc__LastName__c,
													WhoId = '0000000000000'));
					
				}
				else // Create Email to leads created 9am to 5pm
				{
					lstSendTo.add(objLead.JungoLeadsFrc__EmailAddress__c);
					objMail.SetToAddresses(lstSendTo);
					objMail.setReplyTo('help@unitedmortgage.com');
					objMail.setSenderDisplayName('Jason Frangoulis');
					
					lstSendBcc.add('bcerrati@gmail.com');
					objMail.setBccAddresses(lstSendBcc);
					//objMail.setBccAddresses('bcerrati@unitedmortgage.com');
					objMail.setSubject(objLead.JungoLeadsFrc__FirstName__c + ' Welcome to United Mortgage');
					String body = 'Dear ' + objLead.JungoLeadsFrc__FirstName__c + ' ' + objLead.JungoLeadsFrc__LastName__c +',';
					body =+ '';
					objMail.setHtmlBody(body);
					lstMail.add(objMail);
					
					//Task "Call New Lead"
					lstTaskToInsert.add(new Task
											(
												Subject = 'Call New Lead', 
												Priority = 'Normal', 
												Status = 'Not Started', 
												IsReminderSet = true, 
												ReminderDateTime = system.now(), 
												WhoId = '000000000000',
												Description = 'Call Lead Immediatly, Lead Created at ' + objLead.CreatedDate
											)
										);
				
					// Task "NEW LEAD RECIEVED"
					lstTaskToInsert.add(new Task
											(
												Subject = 'NEW LEAD RECIEVED',
												Priority = 'Normal',
												Status = 'Not Started',
												IsReminderSet = true,
												Description = 'New Lead Recieved at ' + objLead.CreatedDate + '. with jungo lead ID of ' + objLead.Name,
												WhoId = '000000000000'
											)
										);
				}
			}
			else
			{
				Messaging.SingleEmailMessage noEmail = new Messaging.SingleEmailMessage();
				List<String> lstSendTo = new List<String>();
				lstSendTo.add('help@unitedmortgage.com');
				noEmail.setToAddresses(lstSendTo);
				noEmail.setReplyTo('help@unitedmortgage.com');
				noEmail.setSenderDisplayName('Lead Warning');
				List<String> lstSendBcc = new List<String>();
				lstSendBcc.add('bcerrati@gmail.com');
				noEmail.setBccAddresses(lstSendBcc);
				//noEmail.setBccAddresses = new String [] {'bcerrati@gmail.com'};
				noEmail.setSubject('WARNING! Lead inserted with no email!');
				String body = 'Dear Jason, Zillow has done the unthinkable and sent over ';
				body += 'a lead that does not contain an email address. Please contact ';
				body += 'Clayton from Zillow if this lead turns out to be a phoney. He can ';
				body += 'can be reached at claytonf@zillowgroup.com. ';
				noEmail.setHtmlBody(body);
				lstMail.add(noEmail);
			}
		
		}
		
		//send email
		if(!lstMail.isEmpty())
			Messaging.sendEmail(lstMail);
		if(!lstTaskToInsert.isEmpty())
			insert lstTaskToInsert;
		if(!lstLeadToUpdate.isEmpty())
			update lstLeadToUpdate;
	}
}


Trigger :

trigger JungoLeadTrigger on JungoLeadsFrc__JungoLeads__c(after insert)
{
	zillowLeadFollowup objHandler = new zillowLeadFollowup();
	if(Trigger.isAfter && Trigger.isInsert)
		objHandler.onAfterInsert(Trigger.New);
}