void call(String stepName) {
    red = '\033[31m'
    blue = '\033[34m'
    normal = '\033[0m'

    stepBanner = "║   $blue$stepName$red   ║"
    bannerWidth = stepName.length() + 6

    top = '╔' + ('═' * bannerWidth) + '╗'
    bottom = '╚' + ('═' * bannerWidth) + '╝'
    ansiColor('xterm') {
        echo "$red$top\n$stepBanner\n$bottom$normal"
    }
}

    // fg_black   = '\x1b[30m'
    // fg_red     = "\x1b[31m"
    // fg_green   = "\x1b[32m"
    // fg_yellow  = "\x1b[33m"
    // fg_blue    = "\x1b[34m"
    // fg_magenta = "\x1b[35m"
    // fg_cyan    = "\x1b[36m"
    // fg_white   = "\x1b[37m"
    // fg_default = "\x1b39m"
    // fg_reset   = "\x1b[0m"

// ═ ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟ ╠ ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬