kp=xget("pixmap");xset("pixmap",1); xset("wwpc"); t=-%pi:0.3:%pi; contour(t,t,sin(t)'*cos(t),10,35,45,"X@Y@Z",[0,2,4]) xset("wshow"); if driver()=='Pos' then sp=5; else sp=1;end for i=35:sp:80, xset("wwpc"); contour(t,t,sin(t)'*cos(t),10,i,45,"X@Y@Z",[0,0,4]) xset("wshow"); end for i=45:sp:80, xset("wwpc"); contour(t,t,sin(t)'*cos(t),10,80,i,"X@Y@Z",[0,0,4]) xset("wshow"); end xset("pixmap",kp);