Zavada's Graphics Algorithm

//  Leave it to Zavada to go overboard on     ;
//  writing a graphics program for an esolang ;
//  with an extremely small standard library! ;
//	Gif of output at: https://gfycat.com/RigidSelfreliantCottonmouth ;

//Storage of each row's ASCII char;
var road = ['=',' ','+','@','+',' ','='];

//Maximum X/Y Values;
const MAX_X = 48;
const MAX_Y = road.len;

//4th quadrant coordinates of [car symbol];
//		n > MAX_X/Y or n < 0 = inverse wrapped number;
var xPos = [2,30,1];
var yPos = [5, 1,1];

//Controls for integer X/Y direction and speed;
//		>=1 : move >=1 characters up/right per tick respectively;
//		<=1 : move <=1 characters down/left per tick respectively;
//		==0 : cease movement on that axis;

var dirX = [0,-1,1];
var dirY = [1, 0,1];

//ASCII representation of each "car";
var carSymbol=['y','x','#'];

//Set window title;
IO.exec("TITLE Zavada\'s Graphic Drawing Algorithm");


//Returns time as an array in HH:MM:SS format;
func getTime(filename?){

	var file = (filename is (what is nil)?"a.time":filename+".time");

	IO.exec("echo %time%>"+file);

	var time = (String::IO.read(file)).split(":");
	time[2] = time[2].sub('\n', "");
	time = toNumbers(time);

	return time;

};

//Returns date as an array in MM/DD/YYYY format;
func getDate(filename?){

	var file = (filename is (what is nil)?"a.date":filename+".date");
	IO.exec("echo %date%>"+file);

	var dayDate = (String::IO.read(file)).split(" ");

	var date = dayDate[1].split("/");

	date[2] = date[2].head(4);
	date = toNumbers(date);

	return date;

};

//Converts an array of Strings to an array of Numbers;
func toNumbers(arr){

	for(var i = 0; i < arr.len; i+=1){

		arr[i] = Number::arr[i];

	}

};

//Calculates seconds since January 1st, 1970;
func timeSinceEpoch(){

	var time = getTime();

	var date = getDate();

	return 	(date[0]-1) * 2629800 + date[1] * 86400 + (date[2] - 1970) * 31557600
			+ time[0] * 3600 + time[1] * 60 + time[2];

};

//Prints out a frame of animation;
func drawRoad(){

	var str = "\n"*256;
	for(var i = 0; i < MAX_Y; i += 1){

		for(var j = 0; j < MAX_X; j += 1){

			for(var k = 0; k < xPos.len; k+=1){

				if(xPos[k] == j && yPos[k] == i){
					str += carSymbol[k];
				}else{
					str += road[i];
				}

			}

		}
		str += "\n";

	}
	print str;

};


var lastTimeMoved = 0; //Last time an update on movement occurred;
var    lastTimeUp = 0; //Last time an update on frames occurred;

var frequency = 1;			 //Update rate of the program;
var     hertz = 1/frequency; //Never used, but may be referenced later;

//Start of infinite rendering/movement loop;
for(;1;){

	var currentTime = timeSinceEpoch();

	if(currentTime - lastTimeMoved >= 1){

		for(var i = 0; i < xPos.len; i+=1){

			if(dirX[i] > 0){

				xPos[i] = (xPos[i]+dirX[i] > MAX_X-1 ? 1 : xPos[i] + dirX[i]);

			} else if(dirX[i] < 0){

				xPos[i] = (xPos[i]+dirX[i] < 0 ? MAX_X-1 : xPos[i] + dirX[i]);

			};

			if(dirY[i] > 0){

				yPos[i] = (yPos[i]+dirY[i] > MAX_Y-1 ? 0 : yPos[i] + dirY[i]);

			}else if(dirY[i] < 0){

				yPos[i] = (yPos[i]+dirY[i] < 0 ? MAX_Y-1 : yPos[i] + dirY[i]);

			}

		}

		drawRoad();

		lastTimeMoved = currentTime;

	};

}

print "Infinite loop terminated somehow";