f:Y = sin(X)

= reset, then it will be reseted to zero
$zoom = 1;      //1 //This will repeat every line few times
$offset = 1.1;    //1.1 //1 //0 -> Zero offset will draw only half of sin curve.
$width = 35;     //20 //35 //40 //This will stretch every line.
$sleep = "0";   //15000 - Wait between lines in microseconds
$line = (" ");     // " " // ":" //chr ( 176 ) //This is the string, that will be repeated from display start to the curve (curve inlay).
$endline = ("+
\n"); // "#
\n" // ".
\n" //chr ( 219 )."
\n" //This is the string, that will be printed at end of every line (curve outline).

//Read settings from form:
if ($_GET["start"] != "") {
  $start = $_GET["start"];}
if ($_GET["reset"] != "") {
  $reset = $_GET["reset"];}
if ($_GET["step"] != "") {
  $step = $_GET["step"];}

if ($_GET["offset"] != "") {
  $offset = $_GET["offset"];}
if ($_GET["width"] != "") {
  $width = $_GET["width"];}
if ($_GET["zoom"] != "") {
  $zoom = $_GET["zoom"];}

if ($_GET["outline"] != "") {
  $endline = ($_GET["outline"]."
\n");}
if ($_GET["inlay"] != "") {
  $line = $_GET["inlay"];}

//Code:
echo ("[SinusCurve]-[c][Harvie][2oo6]
\n
\n");
echo (" |                                                                            y
\n");
echo ("-+----------------------------------------------------------------------------->-------> Y >
\n");
echo ("x|
\n");
echo (" V

\n\n");

//sleep(2);

$pos = $start;
while(1) {

  //usleep($sleep); //Wait in microseconds
  
  $znaku = ((sin($pos) + $offset) * $width);
  
  $zoom2 = $zoom;
  while ($zoom2 > 0) {
  
    $znaku2 = round($znaku); //It looks better after round ;)
    while ($znaku2 > 0) {
      echo $line;
      $znaku2 = ($znaku2 - 1);
    }
    //echo(" ".$pos); //Debug
    echo ($endline);
    
    $zoom2 = ($zoom2 - 1);
  }
  
  $pos = ($pos + $step);
  if ($pos >= $reset) {
    $pos = 0;
    die();
  }

}
?>