Hello!
I have this code so far:

final int NLINHAS = 80; //number of lines
final int COMPINI = 10; //initial length
final int VARCOMP = 20; //length variation
final int LARG = 300;;
final int ALTU = 300;
//caculate the center coordenates
final int XC = LARG / 2;
final int YC = ALTU/ 2;
int xFim, yFim; //line extremity coordenates
int comp = COMPINI; //line length
int varComp = VARCOMP; //length variation
float angulo = 0; //current angle
float varang = (float)(2 * PI / NLINHAS); //calculate the angle increment in radians

void setup() {
 background(255);
 size (LARG, ALTU);
 stroke (100);
 strokeWeight (1);
 noLoop();
 frameRate (20);
 }
 
void draw() {
 //draw the lines
 for (int linha=0; linha < NLINHAS; linha++){
   //calculate the end of the line (xFim, yFim)
   xFim = XC + (int)(comp * cos(angulo));
   yFim = YC - (int)(comp * sin(angulo));
   //verify if (xFim, yFim) is outside of the applet or if the length is negative
   //if it is reduce the length, then the
   //length decreses amd calculate the new point
   if (xFim>LARG || yFim>ALTU || xFim<0 || yFim<0 || comp <0) {
varComp *= -1;
comp += 2*varComp;
xFim = XC + (int)(comp * cos(angulo));
yFim = YC - (int)(comp * sin(angulo));
   }
   //draw the line
   line(XC, YC, xFim, yFim);
   //update the length
   comp += varComp;
   //update the angle
   angulo += varang;
   }
}

My problem is that i want my animation to start with just 1 line. I want the number of lines to be added by 1. So first it will show 1 line then 2 then 3 then 4 and so on.
I think you have to use the line number variable (NLINHAS) with "++" but I'm not sure, and I wouldn't know in what cycle to put it in.
I also want the lines to have a random stroke density.

Would somebody be so kind as to help me figure out a way to animate it in that way. I would very much apreciate it.

Thank you so much!!!

Hi
Sorry i made this new post because I thought my other one had been locked or something.
I'm kinda new at forums.
Keep well Samantha :)