how to display previous ,current and next random numbers in unity.let me explain with

eg..let us assume my first random numbers or equation is 6 + 8 = 15

while it is displaying 1st equation i want to display next random numbers or equation eg 5 + 8 = 15 on next line..here is my code...wht changes i need to do in my code...?

Code (csharp):

1.  
2.  
3.  #pragma strict
4.  var rand1:int;
5.  
6. var rand2:int;
7.  
8. var rand3:int;
9.  
10. var rand4:int;
11.  
12.  var ran:int;
13.  
14. var currTry:int = 0;   //Increment when click on button
15.  
16. var maxTry:int = 20;   //check for max allowed inputs
17.  
18.  
19.  
20.  
21.  
22.  
23.  
24. function Start()
25.  
26. {
27.  
28. ran = Random.Range(0,3);
29.  
30. rand1 = Random.Range(0, 20);//Random number1
31.  
32. rand2= Random.Range(0,20);//Random number2
33.  
34. rand3= Random.Range(0,40);//Random number3
35.  
36. rand4 = rand1 + rand2; //Internally calculation
37.  
38. Debug.Log(rand4);
39.  
40.  
41.  
42. }
43.  
44.  
45.  
46.  
47.  
48.  
49.  
50. function OnGUI()
51.  
52. {
53.  
54.  
55.  
56. if(currTry < maxTry)   //check if we
57.  
58.  
59.  
60. {
61.  
62.  
63.  
64. GUI.Box (Rect (30,5,25,30), rand1.ToString());//first random number
65.  
66.  
67.  
68. GUI.Box (Rect (90,5,25,30), rand2.ToString());//second random number
69.  
70.  
71.  
72. GUI.Box (Rect (150,5,25,30), rand3.ToString());//third random number
73.  
74.  
75.  
76. //GUI.Box (Rect (60,5,25,30),"+");//for +symbol
77.  
78. GUI.Box (Rect (60,5,25,30),GetRandomOperator());
79.  
80. GUI.Box (Rect (120,5,25,30),"=");//for equals to
81.  
82.  
83.  
84. if(GUI.Button(Rect(10,70,50,30),"right"))//GUI button for right
85.  
86. {
87.  
88. currTry++;    //Increment Here
89.  
90.   if(rand4 == rand3)
91.  
92.   {
93.  
94.   Start();
95.  
96.   }
97.  
98.  
99.  
100.   else
101.  
102.        Destroy(this.gameObject);
103.  
104.   }
105.  
106.  
107.  
108. if(GUI.Button(Rect(90,70,50,30),"wrong"))//GUI button for wrong
109.  
110. {
111.  
112. currTry++;      //Increment Here Again
113.  
114.  if(rand4 != rand3)
115.  
116.      Start();
117.  
118.  
119.  
120.  else
121.  
122.     Destroy(this.gameObject);
123.  
124. }
125.  
126. }
127.  
128.  
129.  
130. else
131.  
132. {
133.  
134. Debug.Log("-----------------------------------MAX TRY COMPLETED-------------------------------");
135.  
136. ///Do Something else after 20 Try Done
137.  
138. }
139.  
140.  
141.  
142.   }
143.  
144.   function GetRandomOperator()
145.  
146. {
147. //var ran:int;
148.  //ran = Random.Range(0,4);
149.  
150. switch(ran)
151.  
152. {
153.  
154.  case 0:
155.  
156.    return "+";
157.  
158.  
159.  
160.  case 1:
161.  
162.    return "-";
163.  
164.  
165.  
166.  case 2:
167.  
168.    return "*";
169.  
170.  
171.  
172. }
173.  
174.  
175.  
176. }
177.