diff --git a/day12/input.txt b/day12/input.txt
new file mode 100644
index 0000000..3729d83
--- /dev/null
+++ b/day12/input.txt
@@ -0,0 +1,23 @@
+cpy 1 a
+cpy 1 b
+cpy 26 d
+jnz c 2
+jnz 1 5
+cpy 7 c
+inc d
+dec c
+jnz c -2
+cpy a c
+inc a
+dec b
+jnz b -2
+cpy c b
+dec d
+jnz d -6
+cpy 19 c
+cpy 11 d
+inc a
+dec d
+jnz d -2
+dec c
+jnz c -5
diff --git a/day12/part1.js b/day12/part1.js
new file mode 100644
index 0000000..05a019f
--- /dev/null
+++ b/day12/part1.js
@@ -0,0 +1,55 @@
+var instructions = [];
+var registers = {a: 0, b: 0, c: 0, d: 0};
+
+var instructionSet = {};
+
+instructionSet.cpy = (a, b)=>{
+  if(Number.isInteger(parseInt(a))){
+    registers[b] = parseInt(a);
+  }
+  else{
+    registers[b] = registers[a];
+  }
+}
+
+instructionSet.inc = (a)=>{
+  registers[a]++;
+}
+
+instructionSet.dec = (a)=>{
+  registers[a]--;
+}
+
+instructionSet.jnz = (a, b)=>{
+  if((registers[a] != 0) || ((parseInt(a) != 0) && (!isNaN(parseInt(a))))){
+    pc = pc + (parseInt(b) - 1);
+  }
+}
+
+var input = require("fs").readFileSync("input.txt").toString().replace(/\r/g, "");
+var instructions = input.split("\n").filter((a)=>(a)).map((instruction)=>{
+  if(instruction.indexOf("cpy") > -1){
+    var instructionParts = instruction.match("cpy ([^ ]+) ([^ ]+)");
+    return ["cpy", [instructionParts[1], instructionParts[2]]];
+  }
+  if(instruction.indexOf("inc") > -1){
+    var instructionParts = instruction.match("inc ([^ ]+)");
+    return ["inc", [instructionParts[1]]];
+  }
+  if(instruction.indexOf("dec") > -1){
+    var instructionParts = instruction.match("dec ([^ ]+)");
+    return ["dec", [instructionParts[1]]];
+  }
+  if(instruction.indexOf("jnz") > -1){
+    var instructionParts = instruction.match("jnz ([^ ]+) ([^ ]+)");
+    return ["jnz", [instructionParts[1], instructionParts[2]]];
+  }
+});
+
+var pc = 0;
+while(pc < instructions.length){
+  instructionSet[instructions[pc][0]].apply(null, instructions[pc][1]);
+  pc++;
+}
+console.log(registers);
+console.log(registers[a]);
diff --git a/day12/part2.js b/day12/part2.js
new file mode 100644
index 0000000..365632f
--- /dev/null
+++ b/day12/part2.js
@@ -0,0 +1,55 @@
+var instructions = [];
+var registers = {a: 0, b: 0, c: 1, d: 0};
+
+var instructionSet = {};
+
+instructionSet.cpy = (a, b)=>{
+  if(Number.isInteger(parseInt(a))){
+    registers[b] = parseInt(a);
+  }
+  else{
+    registers[b] = registers[a];
+  }
+}
+
+instructionSet.inc = (a)=>{
+  registers[a]++;
+}
+
+instructionSet.dec = (a)=>{
+  registers[a]--;
+}
+
+instructionSet.jnz = (a, b)=>{
+  if((registers[a] != 0) || ((parseInt(a) != 0) && (!isNaN(parseInt(a))))){
+    pc = pc + (parseInt(b) - 1);
+  }
+}
+
+var input = require("fs").readFileSync("input.txt").toString().replace(/\r/g, "");
+var instructions = input.split("\n").filter((a)=>(a)).map((instruction)=>{
+  if(instruction.indexOf("cpy") > -1){
+    var instructionParts = instruction.match("cpy ([^ ]+) ([^ ]+)");
+    return ["cpy", [instructionParts[1], instructionParts[2]]];
+  }
+  if(instruction.indexOf("inc") > -1){
+    var instructionParts = instruction.match("inc ([^ ]+)");
+    return ["inc", [instructionParts[1]]];
+  }
+  if(instruction.indexOf("dec") > -1){
+    var instructionParts = instruction.match("dec ([^ ]+)");
+    return ["dec", [instructionParts[1]]];
+  }
+  if(instruction.indexOf("jnz") > -1){
+    var instructionParts = instruction.match("jnz ([^ ]+) ([^ ]+)");
+    return ["jnz", [instructionParts[1], instructionParts[2]]];
+  }
+});
+
+var pc = 0;
+while(pc < instructions.length){
+  instructionSet[instructions[pc][0]].apply(null, instructions[pc][1]);
+  pc++;
+}
+console.log(registers);
+console.log(registers[a]);