this is a beginners work - one of the first sketches I made during an education-project. I thougt I shared the fruits of my labors with you.

The goal was to create a pattern-generator at any kind. Mine creates a radial pattern based on the time when you start the sketch up. When done it shows so with a green checkmark - if you like the pattern you can leftclick the screen and it will be stored as a screenshot and a CNC-file which can be used to mill the pattern. Size and depth need to be changed at the beginning of the code.

Have fun!

2. 
   
3. //importing CP5
4. //import controlP5.*;
5. //ControlP5 cp5;
6. //Textlabel myTextlabel;
7. 
   
8. // REMEMBER NEWY AND NEWY DURING FIRST FRAME
9. float firstx;
10. float firsty;
11. float firstxmin;
12. float firstxmax;
13. float firstymin;
14. float firstymax;
15. int tolerance = 1; //AUTO-END & FLUSH NOT WORKING? INCREASE THE DETECTIONTOLERANCE
16. 
    
17. //MECHANIC
18. int rot = 0;
19. int rotinc = 1;
20. int radius = 50;
21. float tiefe = -0.1;
22. int arbeitsgeschwindigkeit = 400;
23. 
    
24. //Zusammenfassungen
25. float newx;
26. float newy;
27. float oldx;
28. float oldy;
29. 
    
30. //B-B-BOOOOLEANS
31. boolean firstframe = true;
32. boolean play = true;
33. 
    
34. //TIME-VARIABLES
35. float h = 1* hour();
36. float m = 1* minute();
37. float s = 1* second();
38. float mapH = map(h, 0, 24, 0, 240); // MAPS HOURS TO A RANGE OF 0-240
39. 
    
40. //COUNTER
41. float counterstartwert = mapH; // THE HIGHER THE NUMBER THE SHARPER IT GETS
42. float counter = counterstartwert; //INITIALIZING COUNTER
43. 
    
44. //PRINTWRITER
45. PrintWriter output; //CREATING CNC-FILE
46. 
    
47. 
    
48. 
    
49. //░░███░░░████░░█████░░█░░░█░░████░░░░░░░
50. //░█░░░░░░█░░░░░░░█░░░░█░░░█░░█░░░█░░░░░░
51. //░░███░░░████░░░░█░░░░█░░░█░░████░░░░░░░
52. //░░░░░█░░█░░░░░░░█░░░░█░░░█░░█░░░░░░░░░░
53. //░░███░░░████░░░░█░░░░░███░░░█░░░░░░░░░░
54. void setup() {
55.   size(600, 600);
56.   background (0);
57.   stroke(255);
58. 
    
59.   frameRate(6000); //means basically: Go as fast as possible.
60.   strokeWeight(1);
61.   println(hour() + ":" + minute() + ":" + second() + "Uhr");
62.   //  print(minute());
63.   //  println(second());
64. 
    
65.   //myTextlabel = new Textlabel(cp5,"Text initalized",100,100,400,200);
66. 
    
67. 
    
68.   output = createWriter("dayrose_" + timestamp() + ".ngc");  
69.   output.println("%");
70.   output.println("G 54");
71. }
72. 
    
73. 
    
74. 
    
75. //░████░░░████░░░░███░░░█░░░█░░░█░░░░░░░░░
76. //░█░░░█░░█░░░█░░█░░░█░░░█░█░█░█░░░░░░░░░░
77. //░█░░░█░░████░░░█░░░█░░░█░█░█░█░░░░░░░░░░
78. //░█░░░█░░█░░░█░░█████░░░░█░░░█░░░░░░░░░░░
79. //░████░░░█░░░█░░█░░░█░░░░█░░░█░░░░░░░░░░░
80. void draw() {
81. 
    
82.   stroke(100);
83.   //line ((width/3)*2, 0, (width/3)*2, height);
84.   //print
85.   //text
86.   stroke ( 255, 100);
87. 
    
88.   if (play == true) {  //░░░░░░░░░░░░░░░░░░░░PLAY//PAUSE
89. 
    
90.     // SIN-COS-BLOCK // 
91.     float xsin = width/2 + sin(radians(rot*(h/24)))*radius*3;  //░█░
92.     float ycos = height/2 + cos(radians(rot*(h/24)))*radius*3; //░█░
93.                                                                //░█░
94.     float xsin2 = xsin + sin(radians (rot*(m/30)))*radius*3;   //░█░
95.     float ycos2 = ycos + cos(radians (rot*(m/30)))*radius*3;   //░█░
96. 
    
97.     newx = xsin2; // MAP SINCOS TO NEWX
98.     newy = ycos2; // MAP SINCOS TO NEWY
99. 
    
100.     float mapX = map (newx, 0, width, 0, 300); //SCALE THE CNC-SKETCH
101.     float mapY = map (newy, 0, height, 0, 300); //SCALE THE CNC-SKETCH
102.     // (DOES NOT CHANGE THE SCALE OF THE ACTUAL SKETCH IN PROCESSING)
103.     // (newx, 0, width, 0, Width of the CNC in MM)
104.     // (newy, 0, height, 0, Height of the CNC in MM)
105.     
106.     //Firstframe-abfrage
107.     if (firstframe == true) { //WHEN FIRSTFRAME...
108.       oldx = newx; // ...SET OLD X TO NEW...
109.       oldy = newy; // ...SET OLD Y TO NEW... (to avoid line from 0,0 to the first properly drawn line)
110. 
     
111.       firstx = newx; //REMEMBER FIRST NEWX-COORDINATE
112.       firsty = newy; //REMEMBER FIRST NEWY-COORDINATE
113.       firstxmin = firstx - tolerance;
114.       firstxmax = firstx + tolerance;
115.       firstymin = firsty - tolerance;
116.       firstymax = firsty + tolerance;
117.       //(those are used to end the process when the line hits the starting-point again)
118.       
119.       println(firstx+"; "+firsty+"; ...firstx and firsty saved!");
120.       output.println("G0 X"+mapX+" Y"+mapY);
121.       output.println("G1 Z "+tiefe+" F" + arbeitsgeschwindigkeit);
122.       //    output.println("G0 Z3");
123.     }
124. 
     
125.     if (counter == 0) { 
126.       line (oldx, oldy, newx, newy); // DRAW LINE ///////////////////////////
127.       output.println("G1 X"+mapX+" Y"+mapY);
128. 
     
129.       oldx = newx; //TRANSFER NEW TO OLD // X //
130.       oldy = newy; //TRANSFER NEW TO OLD // Y //
131.     }
132. 
     
133.     rot += rotinc;
134. 
     
135.     //CHECK IF
136.     if ((((newx <= firstxmax) && (newx >= firstxmin)) && ((newy <= firstymax) && (newy >= firstymin))) && (firstframe == false) && (counter == 0)) {
137.       //  output.println("G01 Z3");
138.       //  output.println("M 02");
139.       //  output.println("%");
140.       //  output.flush(); // Writes the remaining data to the file
141.       //  output.close(); // Finishes the file
142.         line (oldx, oldy, firstx, firsty);
143. 
     
144.         output.println("G1 X"+firstx+" Y"+firsty);
145.       checkdone (round(width/2), round((height/10)*9));
146.       play = false;
147.     }
148.   }  //░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░PLAY//PAUSE
149. 
     
150. 
     
151. 
     
152.   if (mousePressed) { //IF MOUSEPRESSED STOP//
153.     output.println("G01 Z3");
154.     output.println("M 02");
155.     output.println("%");
156.     output.flush(); // Writes the remaining data to the file
157.     output.close(); // Finishes the file
158.     saveFrame("dayrose_" + timestamp() + ".jpg");   
159.     checksaved (round(width/2), round((height/10)*9));
160.     stop();
161.   }
162. 
     
163.   if (firstframe == true) { //SET FIRSTFRAME FALSE//
164.     firstframe = false;
165.   }
166. 
     
167.   if (counter == 0) { //RESET COUNTER WHEN 0//
168.     counter = counterstartwert;
169.   }
170. 
     
171.   counter -= 1; //COUNT DOWN//
172. }
173. 
     
174. 
     
175. 
     
176. String timestamp() {
177.   return String.format("%1$ty%1$tm%1$td_%1$tH%1$tM%1$tS", Calendar.getInstance());
178. }
179. 
     
180. void checkdone (int x, int y) {
181.   strokeWeight(3);
182.   stroke(120, 210, 20);
183.   noFill();
184.   beginShape();
185.   vertex(x+10, y+30);
186.   vertex(x+20, y+40);
187.   vertex(x+40, y+10);
188.   endShape();
189. }
190. 
     
191. void checksaved (int x, int y) {
192.   strokeWeight(5);
193.   stroke(255);
194.   noFill();
195.   beginShape();
196.   vertex(x+10, y+30);
197.   vertex(x+20, y+40);
198.   vertex(x+40, y+10);
199.   endShape();
200.   
201.   strokeWeight(3);
202.   stroke(120, 210, 20);
203.   noFill();
204.   beginShape();
205.   vertex(x+10, y+30);
206.   vertex(x+20, y+40);
207.   vertex(x+40, y+10);
208.   endShape();
209. }