diff --git a/stepper-lecture/hazel.js b/stepper-lecture/hazel.js
index cc12dd86..8321c75f 100644
--- a/stepper-lecture/hazel.js
+++ b/stepper-lecture/hazel.js
@@ -49699,47 +49699,47 @@ be=e[1],bf=a(0,0,0,0,e[2],5),bg=a(0,0,0,0,be,4),f=eb([0,bg,[0,sv(0),[0,bf,0]]]);
 H=e[1],bh=e[3],bi=e[2];if(i)var
 ae=aLD(0);else
 var
-bj=sj(H),bl=[0,c(M_(sj(H)),k)],bm=[0,c(b1(function(b){return 1-c5(b,bj)}),l)],bn=function(b){return aB(g(b),bl,bm,0,bi,6)},bo=[0,a(0,i3G,0,0,bh,7),0],bp=[0,fQ(i3H),0],bq=fe(0),br=[0,c(pq([0,[0,fe(0),bq]],0),bn),bp],bs=[0,fQ(i3I),br],bt=function(b){return c(Y$(0,b),H)},bu=fe(0),bv=[0,c(pq([0,[0,fe(0),bu]],i),bt),bs],ae=akF([0,eb([0,fQ(i3J),bv]),bo]);var
+bj=sj(H),bl=[0,c(M_(sj(H)),k)],bm=function(b){return aB(g(b),bl,0,0,bi,6)},bn=0,bo=7,bp=0,bq=[0,a(0,i3G,[0,c(b1(function(b){return 1-c5(b,bj)}),l)],bp,bh,bo),bn],br=[0,fQ(i3H),0],bs=fe(0),bt=[0,c(pq([0,[0,fe(0),bs]],0),bm),br],bu=[0,fQ(i3I),bt],bv=function(b){return c(Y$(0,b),H)},bw=fe(0),bx=[0,c(pq([0,[0,fe(0),bw]],i),bv),bu],ae=akF([0,eb([0,fQ(i3J),bx]),bq]);var
 f=ae;break;case
 11:var
-I=e[1],bw=e[3],bx=e[2];if(j[3]){var
-by=[0,c(M_([0,I,0]),k)],bz=function(b){return aB(g(b),by,0,0,bw,11)},bA=[0,c(pq(0,i),bz),0],bB=[0,i2E,[0,fe(0),bA]];if(j[4])var
-bC=[0,fe(0),0],bD=[0,N8(1,bx),bC],af=[0,aOI,[0,fe(0),bD]];else
+I=e[1],by=e[3],bz=e[2];if(j[3]){var
+bA=[0,c(M_([0,I,0]),k)],bB=function(b){return aB(g(b),bA,0,0,by,11)},bC=[0,c(pq(0,i),bB),0],bD=[0,i2E,[0,fe(0),bC]];if(j[4])var
+bE=[0,fe(0),0],bF=[0,N8(1,bz),bE],af=[0,aOI,[0,fe(0),bF]];else
 var
 af=0;var
-bE=B(af,bB),bF=[0,cj(I),0],ag=eb(B([0,i2C,[0,fe(0),bF]],bE))}else
+bG=B(af,bD),bH=[0,cj(I),0],ag=eb(B([0,i2C,[0,fe(0),bH]],bG))}else
 var
-bG=e[3],ag=a([0,c(M_([0,I,0]),k)],0,0,0,bG,11);var
+bI=e[3],ag=a([0,c(M_([0,I,0]),k)],0,0,0,bI,11);var
 f=ag;break;case
 12:var
 p=e[1],J=e[3];if(6===J[0]){var
-x=e[4],al=J[2],bV=J[1],bW=e[2];ev(c(gA0,al));if(j[2]){var
-bX=sj(p),bY=pL(x),bZ=[0,c(M_(B(sj(p),bY)),k)],b0=[0,c(b1(function(b){return 1-c5(b,bX)}),l)],b2=[6,c(M_(pL(x)),bV),al],b3=function(b){return aB(g(b),bZ,b0,0,b2,10)},b4=[0,c(pq(0,i),b3),0],b5=[0,bJn,[0,fe(0),b4]];if(j[4])var
-b6=[0,fe(0),0],b7=[0,N8(1,bW),b6],am=[0,aOI,[0,fe(0),b7]];else
+x=e[4],al=J[2],bX=J[1],bY=e[2];ev(c(gA0,al));if(j[2]){var
+bZ=sj(p),b0=pL(x),b2=[0,c(M_(B(sj(p),b0)),k)],b3=[0,c(b1(function(b){return 1-c5(b,bZ)}),l)],b4=[6,c(M_(pL(x)),bX),al],b5=function(b){return aB(g(b),b2,b3,0,b4,10)},b6=[0,c(pq(0,i),b5),0],b7=[0,bJn,[0,fe(0),b6]];if(j[4])var
+b8=[0,fe(0),0],b9=[0,N8(1,bY),b8],am=[0,aOI,[0,fe(0),b9]];else
 var
 am=0;var
-b8=B(am,b5),b9=0,b_=function(b){return c(Y$(0,b),p)},b$=fe(0),an=eb(B([0,bJm,[0,c(pq([0,[0,fe(0),b$]],i),b_),b9]],b8))}else
+b_=B(am,b7),b$=0,ca=function(b){return c(Y$(0,b),p)},cb=fe(0),an=eb(B([0,bJm,[0,c(pq([0,[0,fe(0),cb]],i),ca),b$]],b_))}else
 var
 an=x?eF(0,cj(r(i3O,r(x[1],i3N)))):eF(0,cj(i3P));var
 ak=an}else{var
-K=e[4],bH=e[3],bI=e[2];if(j[2]){var
-ah=sj(p),bJ=[0,c(M_(ah),k)],bK=[0,c(b1(function(b){return 1-c5(b,ah)}),l)],bL=[0,B(pL(K),z)],bM=function(b){return aB(g(b),bJ,bK,bL,bH,10)},bN=[0,c(pq(0,i),bM),0],bO=[0,bJn,[0,fe(0),bN]];if(j[4])var
-bP=[0,fe(0),0],bQ=[0,N8(1,bI),bP],ai=[0,aOI,[0,fe(0),bQ]];else
+K=e[4],bJ=e[3],bK=e[2];if(j[2]){var
+ah=sj(p),bL=[0,c(M_(ah),k)],bM=[0,c(b1(function(b){return 1-c5(b,ah)}),l)],bN=[0,B(pL(K),z)],bO=function(b){return aB(g(b),bL,bM,bN,bJ,10)},bP=[0,c(pq(0,i),bO),0],bQ=[0,bJn,[0,fe(0),bP]];if(j[4])var
+bR=[0,fe(0),0],bS=[0,N8(1,bK),bR],ai=[0,aOI,[0,fe(0),bS]];else
 var
 ai=0;var
-bR=B(ai,bO),bS=0,bT=function(b){return c(Y$(0,b),p)},bU=fe(0),aj=eb(B([0,bJm,[0,c(pq([0,[0,fe(0),bU]],i),bT),bS]],bR))}else
+bT=B(ai,bQ),bU=0,bV=function(b){return c(Y$(0,b),p)},bW=fe(0),aj=eb(B([0,bJm,[0,c(pq([0,[0,fe(0),bW]],i),bV),bU]],bT))}else
 var
 aj=K?eF(0,cj(r(i3L,r(K[1],i3K)))):eF(0,cj(i3M));var
 ak=aj}var
 f=ak;break;case
 13:var
-ao=e[1],ca=a(0,0,0,0,e[2],9),cb=function(b){return aB(g(b),0,0,0,ao,8)},f=aOK(o(2<n(ao)?1:0,cb),ca);break;case
+ao=e[1],cc=a(0,0,0,0,e[2],9),cd=function(b){return aB(g(b),0,0,0,ao,8)},f=aOK(o(2<n(ao)?1:0,cd),cc);break;case
 14:var
-ap=e[2],cc=e[1],cd=function(b){return aB(g(b),0,0,0,ap,23)},c0=o(2<n(ap)?1:0,cd),f=aOK(cj(cc),c0);break;case
+ap=e[2],ce=e[1],cf=function(b){return aB(g(b),0,0,0,ap,23)},c2=o(2<n(ap)?1:0,cf),f=aOK(cj(ce),c2);break;case
 15:var
 f=cj(e[1]);break;case
 16:var
-ce=a(0,0,0,0,e[2],24),aR=[0,ce,[0,cj(i21),0]],f=eb([0,cj(i22),aR]);break;case
+cg=a(0,0,0,0,e[2],24),aR=[0,cg,[0,cj(i21),0]],f=eb([0,cj(i22),aR]);break;case
 17:var
 f=bJt(e[1]);break;case
 18:var
@@ -49749,41 +49749,41 @@ f=bJs(e[1]);break;case
 20:var
 f=bJr(e[1]);break;case
 21:var
-aq=e[1],cf=[0,e[3],13],cg=[0,e[2],12],ar=F(bJz(aq),cg,cf),ch=ar[1],ci=[0,ar[2],0],f=YL([0,ch,[0,cj(c(a6[73],aq)),ci]]);break;case
+aq=e[1],ch=[0,e[3],13],ci=[0,e[2],12],ar=F(bJz(aq),ci,ch),ck=ar[1],cl=[0,ar[2],0],f=YL([0,ck,[0,cj(c(a6[73],aq)),cl]]);break;case
 22:var
-as=e[1],ck=[0,e[3],15],cl=[0,e[2],14],at=E(bJA(as),cl,ck),cm=at[1],cn=[0,at[2],0],f=YL([0,cm,[0,cj(c(a6[74],as)),cn]]);break;case
+as=e[1],cm=[0,e[3],15],cn=[0,e[2],14],at=E(bJA(as),cn,cm),co=at[1],cp=[0,at[2],0],f=YL([0,co,[0,cj(c(a6[74],as)),cp]]);break;case
 23:var
-au=e[1],co=[0,e[3],17],cp=[0,e[2],16],av=E(bJB(au),cp,co),cq=av[1],cr=[0,av[2],0],f=YL([0,cq,[0,cj(c(a6[75],au)),cr]]);break;case
+au=e[1],cq=[0,e[3],17],cr=[0,e[2],16],av=E(bJB(au),cr,cq),cs=av[1],ct=[0,av[2],0],f=YL([0,cs,[0,cj(c(a6[75],au)),ct]]);break;case
 24:var
-aw=e[1],cs=[0,e[3],19],ct=[0,e[2],18],ax=E(bJC(aw),ct,cs),cu=ax[1],cv=[0,ax[2],0],f=YL([0,cu,[0,cj(c(a6[76],aw)),cv]]);break;case
+aw=e[1],cu=[0,e[3],19],cv=[0,e[2],18],ax=E(bJC(aw),cv,cu),cw=ax[1],cx=[0,ax[2],0],f=YL([0,cw,[0,cj(c(a6[76],aw)),cx]]);break;case
 25:var
-cw=e[4],f=bJw(gL(function(c,b){return a(0,0,0,0,b,[1,c])},cw));break;case
+cy=e[4],f=bJw(gL(function(c,b){return a(0,0,0,0,b,[1,c])},cy));break;case
 26:var
 ay=F(Mf,[0,e[1],25],[0,e[2],26]),f=bJu(ay[1],ay[2]);break;case
 27:var
-az=F(nQ,[0,e[1],27],[0,e[2],28]),cx=az[1],aS=[0,az[2],0],f=eb([0,cx,[0,cj(i27),aS]]);break;case
+az=F(nQ,[0,e[1],27],[0,e[2],28]),cz=az[1],aS=[0,az[2],0],f=eb([0,cz,[0,cj(i27),aS]]);break;case
 28:var
-aA=e[1],cy=aA?bJx(gL(function(c,b){return a(0,0,0,0,b,[0,c])},aA)):bJj,f=cy;break;case
+aA=e[1],cA=aA?bJx(gL(function(c,b){return a(0,0,0,0,b,[0,c])},aA)):bJj,f=cA;break;case
 29:var
-cz=e[2],cA=a(0,0,0,0,e[1],29),f=eb([0,cA,[0,i2H,[0,cj(b(h+cz)),0]]]);break;case
+cB=e[2],cC=a(0,0,0,0,e[1],29),f=eb([0,cC,[0,i2H,[0,cj(b(h+cB)),0]]]);break;case
 30:var
 f=cj(e[1]);break;case
 31:var
 aC=e[1],f=Q(aC[1],aC[2],1);break;case
 32:var
-aD=e[1],cB=e[3];if(j[4])var
-cC=a(0,0,0,0,aD,31),aE=akE(cC,eF(6,N8(1,cB)));else
+aD=e[1],cD=e[3];if(j[4])var
+cE=a(0,0,0,0,aD,31),aE=akE(cE,eF(6,N8(1,cD)));else
 var
 aE=a(0,0,0,0,aD,31);var
 f=aE;break;case
 33:var
 y=e[1],aP=0;if(32===y[0]){var
-cD=e[3],cE=y[2],cF=y[1];if(d(ai$,y[3],e[2])){var
-cG=a(0,0,0,0,cF,36),cH=[0,i2Y,[0,N8(1,cD),0]],aF=eb([0,cG,[0,eF(5,eb([0,i2V,[0,YL([0,N8(1,cE),cH]),[0,i20,0]]])),0]]);aP=1}}if(!aP)var
+cF=e[3],cG=y[2],cH=y[1];if(d(ai$,y[3],e[2])){var
+cI=a(0,0,0,0,cH,36),cJ=[0,i2Y,[0,N8(1,cF),0]],aF=eb([0,cI,[0,eF(5,eb([0,i2V,[0,YL([0,N8(1,cG),cJ]),[0,i20,0]]])),0]]);aP=1}}if(!aP)var
 aF=aO(i3Q);var
 f=aF;break;case
 34:var
-aH=e[2],cI=a(0,0,0,0,e[1],33);switch(aH){case
+aH=e[2],cK=a(0,0,0,0,e[1],33);switch(aH){case
 0:var
 q=f5C;break;case
 1:var
@@ -49793,8 +49793,8 @@ q=f5E;break;case
 3:var
 q=f5F;break;default:var
 q=f5G}var
-f=eb([0,cI,[0,eF([6,aH],cj(q)),0]]);break;default:var
-cJ=e[4],cK=e[3],cL=e[2],cM=function(b){return aB(g(b),0,0,0,cL,20)},cN=function(b){return aB(g(b),0,0,0,cK,21)},cO=function(b){return aB(g(b),0,0,0,cJ,22)},cP=[0,fQ(i3R),0],cQ=E_(0),cR=[0,c(pq([0,[0,fe(0),cQ]],0),cO),cP],cS=[0,fQ(i3S),cR],cT=fe(0),cU=[0,c(pq([0,[0,fe(0),cT]],0),cN),cS],cV=[0,fQ(i3T),cU],cW=fe(0),cY=[0,c(pq([0,[0,fe(0),cW]],0),cM),cV],cZ=[0,fQ(i3U),cY],f=eb([0,fQ(i3V),cZ])}var
+f=eb([0,cK,[0,eF([6,aH],cj(q)),0]]);break;default:var
+cL=e[4],cM=e[3],cN=e[2],cO=function(b){return aB(g(b),0,0,0,cN,20)},cP=function(b){return aB(g(b),0,0,0,cM,21)},cQ=function(b){return aB(g(b),0,0,0,cL,22)},cR=[0,fQ(i3R),0],cS=E_(0),cT=[0,c(pq([0,[0,fe(0),cS]],0),cQ),cR],cU=[0,fQ(i3S),cT],cV=fe(0),cW=[0,c(pq([0,[0,fe(0),cV]],0),cP),cU],cY=[0,fQ(i3T),cW],cZ=fe(0),c0=[0,c(pq([0,[0,fe(0),cZ]],0),cO),cY],c1=[0,fQ(i3U),c0],f=eb([0,fQ(i3V),c1])}var
 aL=mn(function(b){return 0===b[1]?1:0},N),aW=ox(bk(function(b){return 0===b[3]?1:0},O),0),aJ=mn(function(d){var
 e=1===d[4]?1:0;if(e){var
 b=d[3];for(;;){if(typeof