How to code m-file program of the following equation Equations are as follow and also the plot x vs y where y is in range -0.6 to 0.6

Equations are as follow

 x1'=y*x1 -x2+ l1*x1(x1^2+x2^2) 
 x2'=x1+y*x2+l1*x2(x1^2+x2^2) 
 y'=e

data are:

 l1 =1 
 e=0.01 
 x1(0)=0.3 
 x2(0)=0.3 
 y(0)= -0.5