const hey = 100;var t, a0, a1, i;begin   i := 1;   a0 := 0;   a1 := 1;   while i < hey do   begin      t := a1;      a1 := a0 + a1;      a0 := t;      i := i + 1;   endend

pl0_compiler sample2.txt

( <3:const, const>  <12:id, hey>  <14:op, =>  <13:int, 100>  <16:semi, ;>  <4:var, var>  <12:id, t>  <15:comma, ,>  <12:id, a0>  <15:comma, ,>  <12:id, a1>  <15:comma, ,>  <12:id, i>  <16:semi, ;> (( <1:begin, begin> (( <12:id, i>  <14:op, :=> ((( <13:int, 1> ))))) <16:semi, ;> (( <12:id, a0>  <14:op, :=> ((( <13:int, 0> ))))) <16:semi, ;> (( <12:id, a1>  <14:op, :=> ((( <13:int, 1> ))))) <16:semi, ;> (( <7:while, while> ((((( <12:id, i> ))) <14:op, <> ((( <12:id, hey> ))))) <8:do, do> ( <1:begin, begin> (( <12:id, t>  <14:op, :=> ((( <12:id, a1> ))))) <16:semi, ;> (( <12:id, a1>  <14:op, :=> ((( <12:id, a0> )) <14:op, +> (( <12:id, a1> ))))) <16:semi, ;> (( <12:id, a0>  <14:op, :=> ((( <12:id, t> ))))) <16:semi, ;> (( <12:id, i>  <14:op, :=> ((( <12:id, i> )) <14:op, +> (( <13:int, 1> ))))) <16:semi, ;>  <2:end, end> ))) <2:end, end> )))add 1 0 v0add v0 0 iadd 0 0 v1add v1 0 a0add 1 0 v2add v2 0 a1l0: add i 0 v3add 100 0 v4jl v3 v4 l1add a1 0 v6add v6 0 tadd a0 0 v7add a1 0 v8add v7 v8 v7add v7 0 a1add t 0 v9add v9 0 a0add i 0 v10add 1 0 v11add v10 v11 v10add v10 0 ijeq 0 0 l0l1: