function[]=cv1(A,x0,iterace);
x=[0:0.01:1];
hold on
plot(x,A*(1-x).*x,'g');
plot(x,x,'r');
xpredtim=x0;
for i=1:iterace,
  xted=A*(1-xpredtim)*xpredtim;  
  plot([xpredtim,xpredtim],[xpredtim,xted]);
  plot([xpredtim,xted],[xted,xted]);
  xpredtim=xted;  
  pause;
end