cb321

    #!/usr/bin/awk -f
    BEGIN {
      # Split on spaces so multi-byte utf8 works
      nText  = split("♥ P E A C E ♥ F O R ♥ A L L", tmp, " ")
      for (i = 0; i < nText; i++) text[i] = tmp[i + 1]
      color0 = 12; color1 = 208  # xterm-256 color cube range
      nColor = color1 - color0   # Could be a pretty gradient
      w = ENVIRON["COLUMNS"]; if (w == "") w = 80
      h = ENVIRON["LINES"];   if (h == "") h = 24
      freq = 0.2
      for (t = 0; 1; t++) {
        x     = int(w/2 + w/4*sin(t*freq) + 0.5)  # x pos ~ sine
        color = color0 + int((nColor*t)/h)%nColor # cycle colors
        ch    = text[t % nText]                   # cycle chars
        printf("%*s\033[38;5;%dm%s\033[m\n", x, "", color, ch)
        fflush()
      # system("sleep 0.1") # awk has no builtin sleep
      }
    }

    #!/usr/bin/env python3
    from os   import environ; E = environ.get
    from math import sin
    from time import sleep
    text = "♥PEACE♥FOR♥ALL" # The text to sine-scroll animate
    nText  = len(text)      # Number of utf8 chars
    freq   = 0.2            # Frequency scaling factor
    color0 = 12             # xt256 Color cube segment 12..<208
    color1 = 208; nColor = color1 - color0
    (w, h) = (int(E("COLUMNS", 80)), int(E("LINES", 24)))
    t = 0
    while True:
        x = (w/2) + (w/4)*sin(t*freq)           # x pos via sine value
        x = max(0, min(w - 1, int(x + 0.5)))    # bound to tty width
        color = color0 + ((nColor*t)//h)%nColor # cycle colors
        ch = text[t%nText]  # Get char & Use xterm-256 color escs
        print("%*s\033[38;5;%sm%s\033[m\n" % (x, "", color, ch))
        t += 1
        sleep(0.1)   # original used bc shell outs to rate-limit