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contracts...ABSTRACT_NFT.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "erc721a/contracts/ERC721A.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract ABSTRACT_NFT is ERC721A, Ownable { // edit contract name

    string private baseURI = "ipfs://bafybeievvphzbpan4l7nbem25nehiizhh3wcdnizycsm7my3qh5ggj3m6m/";

    constructor() ERC721A("ABSTRACT NFT", "ABSTRACT NFT") { // edit
        _safeMint(msg.sender, 100);
    }

    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        return string(abi.encodePacked(baseURI, Strings.toString(tokenId), ".json"));
    }

    function setNewBaseURI(string memory _newbaseURI) public onlyOwner {
        baseURI = _newbaseURI;                         
    }

    function mintQuantity(uint256 _quantity) public onlyOwner {
        _safeMint(msg.sender, _quantity);
    }
}

https://etherscan.io/address/0x76f82F453c705F4339602D41dE8471F19A1E65ff

https://opensea.io/collection/hitoza-stars