U8 *old_font = text.font;

// See ::/Kernel/FontStd.CC, ::/Demo/ScreenCodes.CC,
//::/Demo/ExtChars.CC, and ::/Demo/Graphics/FontEd.CC.

U64 waves[4] = {0x0011AA440011AA44,0x0022558800225588,0x0044AA110044AA11,0x0088552200885522};

U0 AnimateEndCB()
{
    text.font = old_font;
    Exit;
}

U0 AnimateTask(I64)
{
    I64  i;
    U64 *font = MAlloc(256 * 8);

    Fs->task_end_cb = &AnimateEndCB;
    MemCopy(font, text.font, 256 * 8);
    text.font = font;
    while (TRUE)
    {
        font[CH_SPACE] = waves[i++ & 0x3];
        Sleep(100);
    }
}

Spawn(&AnimateTask, NULL, "Animate",, Fs);
TaskRep;