Instead of using m = millis(), use m = millis() - startTime where startTime is set to millis() in setup and after the end of the last scene.

thank you, i tried but obviously i am missing something here

int startTime;
void setup(){
size(200,200);
frameRate(12);
startTime=millis();
}
void scene1(){
fill(255,0,0);
rectMode(CENTER);
rect(width/2,height/2,50,50);
}
void scene2(){
fill(0);
ellipse(width/2,height/2,50,50);
}
void scene3(){
fill(255);
line(0,0,width,height);
}
void draw(){
background(127);
int m=millis()-startTime;

if(m<2000){
  scene1();
} else if (m<4000){
  scene2();
}else if(m<6000){
scene3();
}
startTime=millis();
}

By "after the last scene", I meant it in time, not in the code... Perhaps add another test on m, eg. < 8000

sorry, i am confused
if possible can you show me this in code?

I suck at explaining things...

1. void draw() {
2.   background(127);
3.   int m = millis() - startTime;
4.   if (m < 2000) {
5.     scene1();
6.   } else if (m < 4000) {
7.     scene2();
8.   } else if (m < 6000) {
9.     scene3();
10.   } else if (m < 8000) {
11.     startTime = millis();
12.   }
13. }

Note: I used Ctrl+T in PDE (Edit > Auto Format) to improve the look of the code... (and a bit of manual edit).

:) no! i am slow in the head, thank you for patience!
now it loops (full code below if anyone else are interested in same topic)
BUT what if i want to repeat this sequence say 3 times and then another  one for 2 times and then repeat it all again ?
//something like
loop{
3.do{seq1};
2.do{seq2};
}


// repeat the sequence
int startTime;
void setup(){
size(200,200);
frameRate(12);
}
void scene1(){
fill(255,0,0);
rectMode(CENTER);
rect(width/2,height/2,50,50);
}
void scene2(){
fill(0);
ellipse(width/2,height/2,50,50);
}
void scene3(){
fill(255);
line(0,0,width,height);
}
void draw(){
background(127);
int m = millis() - startTime;

if(m<2000){
  scene1();
} else if (m<4000){
  scene2();
}else if(m<6000){
scene3();
}
else if(m<8000){
startTime=millis();
}
}

It needs more logic, counters, etc. Perhaps I could have made it more generic, with objects handling the repetitions, encapsulating the sequences and section but that's much more work and more complex. Here I just made a kind of ad hoc code that you should be able to extend to more sections or more sequences.

1. // repeat the sequence
2. int startTime;
3.  
4. void setup() {
5.   size(200, 200);
6.   frameRate(12);
7. }
8.  
9. void scene1() {
10.   text("s1", 20, 20);
11.   fill(255, 0, 0);
12.   rectMode(CENTER);
13.   rect(width/2, height/2, 50, 50);
14. }
15.  
16. void scene2() {
17.   text("s2", 20, 20);
18.   fill(0);
19.   ellipse(width/2, height/2, 50, 50);
20. }
21.  
22. void scene3() {
23.   text("s3", 20, 20);
24.   fill(255);
25.   line(0, 0, width, height);
26. }
27.  
28. int currentSeq = 1;
29. boolean seq1End = false;
30. int seq1Counter = 1;
31. boolean seq2End = false;
32. int seq2Counter = 1;
33.  
34. void draw() {
35.   background(127);
36.   fill(255);
37.   switch (currentSeq) {
38.   case 1:
39.     text("seq1 " + seq1Counter, 20, 40);
40.     seq1();
41.     if (seq1End) { // Last scene played
    
42.       seq1End = false; // To be restarted
    
43.       if (++seq1Counter > 3) { // If we havet exhausted the count of this sequence
    
44.         currentSeq++; // Go to next sequence
    
45.         seq2Counter = 1; // Which must start at 1
    
46.       }
47.     }
48.     break;
49.   case 2:
50.     text("seq2 " + seq2Counter, 20, 40);
51.     seq2();
52.     if (seq2End) {
53.       seq2End = false;
54.       if (++seq2Counter > 2) {
55.         currentSeq = 1; // Reset on last seq
56.         seq1Counter = 1;
57.       }
58.     }
59.     break;
60.   }
61. }
62.  
63. void seq1() {
64.   int m = millis() - startTime;
65.   if (m < 2000) {
66.     scene1();
67.   } else if (m < 4000) {
68.     scene2();
69.   } else if (m < 6000) {
70.     scene3();
71.   } else if (m < 8000) {
72.     startTime = millis();
73.     seq1End = true;
74.   }
75. }
76.  
77. void seq2() {
78.   int m = millis() - startTime;
79.   if (m < 2000) {
80.     scene3();
81.   } else if (m < 4000) {
82.     scene1();
83.   } else if (m < 6000) {
84.     scene2();
85.   } else if (m < 8000) {
86.     startTime = millis();
87.     seq2End = true;
88.   }
89. }