diff --git a/bootstrap/isbpl.js b/bootstrap/isbpl.js
index cdd5c99..d018adc 100644
--- a/bootstrap/isbpl.js
+++ b/bootstrap/isbpl.js
@@ -1,6 +1,204 @@
 #!/bin/node
 
-const fs = require('fs')
-const process = require('process')
+const fs = require('fs');
+const process = require('process');
+
+const stack = [];
+const vars = [{}];
+const keywords = [
+    "native",
+    "func",
+    "if",
+    "def",
+    "stop",
+];
+let insns;
+let die = 0;
+
+const natives = {
+    "alen": function () {
+        stack.push(stack.pop().length);
+    },
+    "aget": function () {
+        let idx = stack.pop();
+        let array = stack.pop();
+        stack.push(array[idx]);
+    },
+    "aput": function () {
+        let val = stack.pop();
+        let idx = stack.pop();
+        let array = stack.pop();
+        array[idx] = val;
+    },
+    "anew": function () {
+        let length = stack.pop();
+        let val = stack.pop();
+        stack.push(Array.apply(val, Array(length));
+    },
+    "_char": function () {
+        stack.push(String.fromCharCode(stack.pop()));
+    },
+    "_int": function () {
+        stack.push(Number(stack.pop()));
+    },
+    "_file": function () {
+        stack.push(String(stack.pop()));
+    },
+    "_float": function () {
+        stack.push(Number(stack.pop()));
+    },
+    "_long": function () {
+        stack.push(Number(stack.pop()));
+    },
+    "_double": function () {
+        stack.push(Number(stack.pop()));
+    },
+    "ischar": function () {
+        let x = stack.pop();
+        stack.push(x instanceof String && x.length == 1)
+    },
+    "isint": function () {
+        let x = stack.pop();
+        stack.push(x instanceof Number)
+    },
+    "isfloat": function () {
+        let x = stack.pop();
+        stack.push(x instanceof Number)
+    },
+    "islong": function () {
+        let x = stack.pop();
+        stack.push(x instanceof Number)
+    },
+    "isdouble": function () {
+        let x = stack.pop();
+        stack.push(x instanceof Number)
+    },
+    "putchar": function () {
+        if(x instanceof String && x.length == 1)
+            process.stdout.write(x);
+        else
+            process.stdout.write(Number(x))
+        process.stdout.flush();
+    },
+    "read": function () {
+        let filename = stack.pop();
+        stack.push(fs.readFileSync(filename, "iso-8859-1"));
+    },
+    "write": function () {
+        let content = stack.pop();
+        let filename = stack.pop();
+        fs.writeFileSync(filename, content, { encoding: "iso-8859-1" });
+    },
+    "flength": function () {
+        let filename = stack.pop();
+        stack.push(fs.statSync(filename).size);
+    },
+    "mktype": function () {
+    },
+    "type": function () {
+    },
+    "call": function () {
+        resolve(stack.pop(), 0);
+    },
+    "typename": function () {
+    }
+}
+
+function beginBlock(i) {
+    if(insns[i++] !== "{") {
+        console.err("Exoected { at " + insns[i] + " at beginning of block!")
+        process.exit(1);
+    }
+    const finsns = [];
+    let n = 1;
+    while(n > 0) {
+        finsns.push(insns[i]);
+        if(insns[i] === "{") n++;
+        if(insns[i] === "}") n--;
+        i++;
+    }
+    finsns.pop();
+    return [
+        function call () {
+            for(let j = 0; j < finsns.length; ) {
+                j = resolve(finsns[j], j);
+                if(die > 0) {
+                    die--;
+                    return;
+                }
+            }
+        },
+        i
+    ]
+}
+
+function handleKeyword(id, i) {
+    if(id === "def") {
+        i++;
+        vars.peek()[insns[i]] = 0
+        vars.peek()["=" + insns[i]] = function set() {
+            vars.peek()[insns[i]] = stack.pop();
+        };
+    }
+    if(id === "native") {
+        i++;
+        vars.peek()[insns[i]] = natives[insns[i]];
+    }
+    if(id === "if") {
+        i++;
+        const block = beginBlock();
+        if(stack.pop()) {
+            block[0]();
+        }
+        i = block[1];
+    }
+    if(id === "func") {
+        i++;
+        const block = beginBlock(i);
+        vars.peek()[insns[i]] = block[0];
+        i = block[1];
+    }
+    if(id === "while") {
+        i++;
+        const n = i;
+        // This is needed to set the insn pointer to the right location after the block
+        let block;
+        while((function check() {
+            while(insns[i] !== "{") {
+                i = resolve(insns[i], i);
+            }
+            i--;
+            return stack.pop()
+        })()) {
+            block = block || beginBlock(i);
+            block[0]();
+            i = n;
+        }
+        block = block || beginBlock(i);
+        i = block[1];
+    }
+    if(id === "stop") {
+        die = stack.pop()
+    }
+    return i + 1;
+}
+
+function resolve(id, i) {
+    if(keywords.contains(keywords)) {
+        return handleKeyword(id, i);
+    }
+    let toRun = vars.peek()[id] || vars[0][id];
+    if(!toRun) {
+        console.err("Could not find keyword " + id + "!");
+        process.exit(1);
+    }
+    else {
+        toRun();
+    }
+    return ++i;
+}
 
 
+for(let i = 0; i < isns.length; ) {
+    i = resolve(insns[i]);
+}
diff --git a/isbpl.isbpl b/isbpl.isbpl
index fdf2b7c..b2de30a 100644
--- a/isbpl.isbpl
+++ b/isbpl.isbpl
@@ -1,7 +1,7 @@
-
-"" =insns
+def insns
 
 func main { # entry point returning int
+    def insns filename
     =args # put arg array into args var
     args 0 aget =filename
 
@@ -12,6 +12,12 @@ func main { # entry point returning int
 }
 
 func compile {
+    def file
+    def content
+    def i
+    def ln
+    def j
+    def c
     =file
 
     # read & split content
@@ -49,6 +55,11 @@ func compile {
 }
 
 func mkcode {
+    def allowfunc
+    def content
+    def definefunc
+    def level
+    def i
     =allowfunc
     =content
 
diff --git a/std.isbpl b/std.isbpl
index 931f054..562ffee 100644
--- a/std.isbpl
+++ b/std.isbpl
@@ -1,18 +1,18 @@
-native func alen
-native func aget
-native func aput
-native func anew
-native func _array
+native alen
+native aget
+native aput
+native anew
+native _array
 func __array {
     "NotImplemented" "Not implemented" throw
 }
 
-native func _char
-native func _int
-native func _file
-native func _float
-native func _long
-native func _double
+native _char
+native _int
+native _file
+native _float
+native _long
+native _double
 
 func __char {
     _char
@@ -23,53 +23,52 @@ func __int {
 func __file {
     _file
 }
-native func __float
+native __float
 func __long {
     _long
 }
-native func __double
+native __double
 
-native func ischar
-native func isint
-native func isfloat
-native func islong
-native func isdouble
+native ischar
+native isint
+native isfloat
+native islong
+native isdouble
 
-native func stop
-native func include
-native func putchar
-native func read
-native func flength
-native func write
-native func type
-native func mktype
+native include
+native putchar
+native read
+native flength
+native write
+native type
+native mktype
 # call a dynamically computed function
-native func call
-native func typename
-native func istype
-native func settype
-native func throw
+native call
+native typename
+native istype
+native settype
 # try and catch are keywords, not functions
+native throw
 # storelength
-native func stlen
+native stlen
 
-native func eq
-native func gt
-native func lt
-native func not
-native func or
-native func and
-native func +
-native func -
-native func /
-native func *
-native func **
-native func %
-native func ^
+native eq
+native gt
+native lt
+native not
+native or
+native and
+native +
+native -
+native /
+native *
+native **
+native %
+native ^
 
-native func dup
-native func pop
-native func swap
+native dup
+native pop
+native swap
 
 "char" mktype =TYPE_CHAR
 "int" mktype =TYPE_INT