AWS cloudeformation Create VPC(2 pubulic subnet and 2 private subnet)

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Resources": {
    "MainVPC": {
      "Type": "AWS::EC2::VPC",
      "Properties": {
        "CidrBlock": "10.0.0.0/16",
        "EnableDnsSupport": "true",
        "EnableDnsHostnames": "true",
        "InstanceTenancy": "default",
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          }
        ]
      }
    },
    "InetGW": {
      "Type": "AWS::EC2::InternetGateway",
      "Properties": {
        "Tags" : [  
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "AttachInetGW": {
      "Type": "AWS::EC2::VPCGatewayAttachment",
      "Properties": {
        "InternetGatewayId": {
          "Ref": "InetGW"
        },
        "VpcId": {
          "Ref": "MainVPC"
        }
      },
      "DependsOn": [
        "MainVPC",
        "InetGW"
      ]
    },
    "PubAsub": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "CidrBlock": "10.0.1.0/24",
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": {
                "Ref": "AWS::Region"
              }
            }
          ]
        },
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          },
          {
            "Key" : "Network",
            "Value" : "Public"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "PubBsub": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "CidrBlock": "10.0.2.0/24",
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": {
                "Ref": "AWS::Region"
              }
            }
          ]
        },
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          },
          {
            "Key" : "Network",
            "Value" : "Public"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "PrivateAsub": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "CidrBlock": "10.0.11.0/24",
        "AvailabilityZone": {
          "Fn::Select": [
            "0",
            {
              "Fn::GetAZs": {
                "Ref": "AWS::Region"
              }
            }
          ]
        },
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          },
          {
            "Key" : "Network",
            "Value" : "Private"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "PrivateBsub": {
      "Type": "AWS::EC2::Subnet",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "CidrBlock": "10.0.12.0/24",
        "AvailabilityZone": {
          "Fn::Select": [
            "1",
            {
              "Fn::GetAZs": {
                "Ref": "AWS::Region"
              }
            }
          ]
        },
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          },
          {
            "Key" : "Network",
            "Value" : "Private"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "InternetRouteTable": {
      "Type": "AWS::EC2::RouteTable",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "Tags": [
          {
            "Key" : "Application",
            "Value" : { "Ref" : "AWS::StackName"}
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "InternetRote": {
      "Type": "AWS::EC2::Route",
      "Properties": {
        "RouteTableId": {
          "Ref": "InternetRouteTable"
        },
        "DestinationCidrBlock" : "0.0.0.0/0",
        "GatewayId": {
          "Ref": "InetGW"
        }
      },
      "DependsOn": [
        "AttachInetGW"
      ]
    },
    "PubSubRouteTableAssociationA" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PubAsub" },
        "RouteTableId" : { "Ref" : "InternetRouteTable" }
      }
    },  
    "PubSubRouteTableAssociationB" : {
      "Type" : "AWS::EC2::SubnetRouteTableAssociation",
      "Properties" : {
        "SubnetId" : { "Ref" : "PubBsub" },
        "RouteTableId" : { "Ref" : "InternetRouteTable" }
      }
    },  
    "WebSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "GroupDescription": "Allow access from HTTP and HTTPS traffic",
        "SecurityGroupIngress": [
          {
            "IpProtocol": "tcp",
            "FromPort": "80",
            "ToPort": "80",
            "CidrIp": "0.0.0.0/0"
          },
          {
            "IpProtocol": "tcp",
            "FromPort": "443",
            "ToPort": "443",
            "CidrIp": "0.0.0.0/0"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    },
    "SSHSecurityGroup": {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties": {
        "VpcId": {
          "Ref": "MainVPC"
        },
        "GroupDescription": "Allow access from SSH traffic",
        "SecurityGroupIngress": [
          {
            "IpProtocol": "tcp",
            "FromPort": "22",
            "ToPort": "22",
            "CidrIp": "0.0.0.0/0"
          }
        ]
      },
      "DependsOn": [
        "MainVPC"
      ]
    }
  }
}