switch (choice)
    {
    case 'b': //bylo red
        for (size_t i = 0; i < file_info->height; i++){
            for (size_t j = 0; j < file_info->widhth ; j++){
                pixels[i][j].red = num;
            }
        }
        break;
    case 'r': //bylo blue
        for (size_t i = 0; i < file_info->height; i++){
            for (size_t j = 0; j < file_info->widhth; j++){
                pixels[i][j].blue = num;
            }
        }
        break;
    case 'g':
        for (size_t i = 0; i < file_info->height; i++){
            for (size_t j = 0; j < file_info->widhth; j++){
                pixels[i][j].green = num;
            }
        }
        break;
    default:
        puts("Try again!");
        goto link11;
    }