diff --git a/create_ec2.sh b/create_ec2.sh
new file mode 100755
index 0000000..b233f1f
--- /dev/null
+++ b/create_ec2.sh
@@ -0,0 +1,100 @@
+#!/bin/bash
+set -euo pipefail
+
+check_awscli() {
+    if ! command -v aws &> /dev/null; then
+        echo "AWS CLI is not installed. Please install it first." >&2
+        return 1
+    fi
+}
+
+install_awscli() {
+    echo "Installing AWS CLI v2 on Linux..."
+
+    # Download and install AWS CLI v2
+    curl -s "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
+    sudo apt-get install -y unzip &> /dev/null
+    unzip -q awscliv2.zip
+    sudo ./aws/install
+
+    # Verify installation
+    aws --version
+
+    # Clean up
+    rm -rf awscliv2.zip ./aws
+}
+
+wait_for_instance() {
+    local instance_id="$1"
+    echo "Waiting for instance $instance_id to be in running state..."
+
+    while true; do
+        state=$(aws ec2 describe-instances --instance-ids "$instance_id" --query 'Reservations[0].Instances[0].State.Name' --output text)
+        if [[ "$state" == "running" ]]; then
+            echo "Instance $instance_id is now running."
+            break
+        fi
+        sleep 10
+    done
+}
+
+create_ec2_instance() {
+    local ami_id="$1"
+    local instance_type="$2"
+    local key_name="$3"
+    local subnet_id="$4"
+    local security_group_ids="$5"
+    local instance_name="$6"
+
+    # Run AWS CLI command to create EC2 instance
+    instance_id=$(aws ec2 run-instances \
+        --image-id "$ami_id" \
+        --instance-type "$instance_type" \
+        --key-name "$key_name" \
+        --subnet-id "$subnet_id" \
+        --security-group-ids "$security_group_ids" \
+        --tag-specifications "ResourceType=instance,Tags=[{Key=Name,Value=$instance_name}]" \
+        --query 'Instances[0].InstanceId' \
+        --output text
+    )
+
+    if [[ -z "$instance_id" ]]; then
+        echo "Failed to create EC2 instance." >&2
+        exit 1
+    fi
+
+     if [[ "$instance_name" == "Shell-Script-EC2-Demo" ]]; then
+        echo "Same instance name is present, if you want change name of instance" >&2
+        exit 1
+    fi
+
+    echo "Instance $instance_id created successfully."
+
+    # Wait for the instance to be in running state
+    wait_for_instance "$instance_id"
+}
+
+main() {
+    
+    if ! check_awscli; then
+    install_awscli || exit 1
+    fi
+
+
+    echo "Creating EC2 instance..."
+
+    # Specify the parameters for creating the EC2 instance
+    AMI_ID="ami-084568db4383264d4"
+    INSTANCE_TYPE="t2.micro"
+    KEY_NAME="shell-project-keypair"
+    SUBNET_ID="subnet-0e2ab1c36757c9201"
+    SECURITY_GROUP_IDS="sg-03bc7b302f02f0ecd"  # Add your security group IDs separated by space
+    INSTANCE_NAME="Shell-Script-EC2-Demo"
+
+    # Call the function to create the EC2 instance
+    create_ec2_instance "$AMI_ID" "$INSTANCE_TYPE" "$KEY_NAME" "$SUBNET_ID" "$SECURITY_GROUP_IDS" "$INSTANCE_NAME"
+
+    echo "EC2 instance creation completed."
+}
+
+main "$@"
diff --git a/day04/create_ec2.sh b/day04/create_ec2.sh
old mode 100644
new mode 100755
index cb55720..887b845
--- a/day04/create_ec2.sh
+++ b/day04/create_ec2.sh
@@ -4,7 +4,7 @@ set -euo pipefail
 check_awscli() {
     if ! command -v aws &> /dev/null; then
         echo "AWS CLI is not installed. Please install it first." >&2
-        exit 1
+        return 1
     fi
 }
 
@@ -63,6 +63,11 @@ create_ec2_instance() {
         exit 1
     fi
 
+    if [[ "$instance_name" == "Shell-Script-EC2-Demo" ]]; then
+    echo "Same instance name is present, if you want change name of instance" >&2
+    exit 1
+    fi
+
     echo "Instance $instance_id created successfully."
 
     # Wait for the instance to be in running state
@@ -70,16 +75,20 @@ create_ec2_instance() {
 }
 
 main() {
-    check_awscli || install_awscli
+    
+    if ! check_awscli; then
+    install_awscli || exit 1
+    fi
+
 
     echo "Creating EC2 instance..."
 
     # Specify the parameters for creating the EC2 instance
-    AMI_ID=""
+    AMI_ID="ami-084568db4383264d4"
     INSTANCE_TYPE="t2.micro"
-    KEY_NAME=""
-    SUBNET_ID=""
-    SECURITY_GROUP_IDS=""  # Add your security group IDs separated by space
+    KEY_NAME="shell-project-keypair"
+    SUBNET_ID="subnet-0e2ab1c36757c9201"
+    SECURITY_GROUP_IDS="sg-03bc7b302f02f0ecd"  # Add your security group IDs separated by space
     INSTANCE_NAME="Shell-Script-EC2-Demo"
 
     # Call the function to create the EC2 instance