// Create an instancefunction Variate(){        var iX = 4, iY = 4;        while (true){                // Move one step                switch ((Math.random() * 4) >> 0){                case 0:                        iX += 1;                        break;                case 1:                        iY += 1;                        break;                case 2:                        iX -= 1;                        break;                default: // Both deals with the case 3 and the very rare exceptional case 4                        iY -= 1;                }                // Test if the particle hit the boundary                if (iX == 0 || iY == 0 || iX == 6 || iY == 6){                        return { x : iX, y : iY };                }        }}var oInst; // Instance for each simulationvar iCnt = 0; // Count of instances where particle hit the bottomfor (var iN = 0; 1000000 > iN; iN++){        oInst = Variate();        if (oInst.y == 0){                iCnt++;        }}WScript.Echo(iCnt / iN);