How do I build an AWS ec2 natgateway with Terraform?

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// 1. Create VPC
const main = new aws.ec2.Vpc("main", {
    cidrBlock: "10.0.0.0/16",
    tags: {
        Name: "main-vpc",
    },
});
// 2. Create Public Subnet
const _public = new aws.ec2.Subnet("public", {
    vpcId: main.id,
    cidrBlock: "10.0.1.0/24",
    mapPublicIpOnLaunch: true,
    tags: {
        Name: "public-subnet",
    },
});
// 2. Create Private Subnet
const _private = new aws.ec2.Subnet("private", {
    vpcId: main.id,
    cidrBlock: "10.0.2.0/24",
    tags: {
        Name: "private-subnet",
    },
});
// 3. Create Internet Gateway
const igw = new aws.ec2.InternetGateway("igw", {
    vpcId: main.id,
    tags: {
        Name: "vpc-igw",
    },
});
// 4. Create Elastic IP for NAT Gateway
const natEip = new aws.ec2.Eip("nat_eip", {vpc: true});
// 5. Create NAT Gateway
const nat = new aws.ec2.NatGateway("nat", {
    allocationId: natEip.id,
    subnetId: _public.id,
    tags: {
        Name: "nat-gateway",
    },
});
// 6. Create Route Table for Public Subnet
const publicRt = new aws.ec2.RouteTable("public_rt", {
    vpcId: main.id,
    routes: [{
        cidrBlock: "0.0.0.0/0",
        gatewayId: igw.id,
    }],
    tags: {
        Name: "public-route-table",
    },
});
// 6. Associate Public Route Table with Public Subnet
const publicAssociation = new aws.ec2.RouteTableAssociation("public_association", {
    subnetId: _public.id,
    routeTableId: publicRt.id,
});
// 6. Create Route Table for Private Subnet
const privateRt = new aws.ec2.RouteTable("private_rt", {
    vpcId: main.id,
    routes: [{
        cidrBlock: "0.0.0.0/0",
        natGatewayId: nat.id,
    }],
    tags: {
        Name: "private-route-table",
    },
});
// 6. Associate Private Route Table with Private Subnet
const privateAssociation = new aws.ec2.RouteTableAssociation("private_association", {
    subnetId: _private.id,
    routeTableId: privateRt.id,
});
export const vpcId = main.id;
export const publicSubnetId = _public.id;
export const privateSubnetId = _private.id;
export const natGatewayId = nat.id;
export const publicRouteTableId = publicRt.id;
export const privateRouteTableId = privateRt.id;