Steps:

1.    Create 2 instances and add http port and also install nginx enable it . 2.    For load balancer u will need target group 3.    Go to EC2 service scroll down u will see target groups 4.    Create target group > add instances > save and create . 5.    Now create load balancer (Application load balancer) > configure it give name , vpc ,select availability zones, select Target Groups u created and create load balancer. 6.    Check it your load balancer is working or not. 7.    If working , Create s3 bucket  and go to permission >  bucket policy and edit it :- 8.    Note :-  Find policy from this by searching on google enable access log of load balancer to s3

Policy :-

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws-us-gov:iam::elb-account-id:root"
      },
      "Action": "s3:PutObject",
      "Resource": "s3-bucket-arn"
    }
  ]
}

9.    Save it.

10.  Now go to load balancer u created > go to attributes section >  scroll down and u will see this monitoring sec enable access logs and add our bucket

11.           Save changes. 12.           U will see ur logs folder in ur s3 bucket.