diff --git a/testing_files/auto_crash.nas b/testing_files/auto_crash.nas
new file mode 100644
index 0000000..0d213d6
--- /dev/null
+++ b/testing_files/auto_crash.nas
@@ -0,0 +1,83 @@
+# Road check and auto pilot(??) by ValKmjolnir
+
+var position_change = func(position_val,value){
+    if(position_val+value>180)
+        position_val += value-360;
+    else if(position_val+value<-180)
+        position_val += value+360;
+    else
+        position_val += value;
+    return position_val;
+}
+var road_check_func = func(){
+    
+    var lat = props.getNode("/position/latitude-deg",1).getValue();
+    var lon = props.getNode("/position/longitude-deg",1).getValue();
+    var position_info = geodinfo(lat,lon);
+    var position_names = position_info[1].names;
+    # the friction_factor of freeway runway and road is 1
+
+    if((position_names[0]=="Freeway") or (position_names[0]=="Road"))
+    {
+        var car_heading = 0;
+        var lat_change  = 0;
+        var lon_change  = 0;
+        var left_range  = 0;
+        var right_range = 0;
+        
+        for(var i=0;i>-0.00005;i-=0.000001)
+        {
+            car_heading = props.getNode("/orientation/heading-deg",1).getValue();
+            lat_change  = math.sin(math.pi*car_heading/180);
+            lon_change  = -math.cos(math.pi*car_heading/180);
+            lat = props.getNode("/position/latitude-deg",1).getValue()+0.0001*math.cos(math.pi*car_heading/180);
+            lon = props.getNode("/position/longitude-deg",1).getValue()+0.0001*math.sin(math.pi*car_heading/180);
+            var other_position_info = geodinfo(position_change(lat,i*lat_change),position_change(lon,i*lon_change));
+            var other_names = other_position_info[1].names;
+            if((other_names[0]=="Freeway") or (other_names[0]=="Road"))
+                right_range += 1;
+            else
+                break;
+        }
+        for(var i=0;i<0.00005;i+=0.000001)
+        {
+            car_heading = props.getNode("/orientation/heading-deg",1).getValue();
+            lat_change  = math.sin(math.pi*car_heading/180);
+            lon_change  = -math.cos(math.pi*car_heading/180);
+            lat = props.getNode("/position/latitude-deg",1).getValue()+0.0001*math.cos(math.pi*car_heading/180);
+            lon = props.getNode("/position/longitude-deg",1).getValue()+0.0001*math.sin(math.pi*car_heading/180);
+            var other_position_info = geodinfo(position_change(lat,i*lat_change),position_change(lon,i*lon_change));
+            var other_names = other_position_info[1].names;
+            if((other_names[0]=="Freeway") or (other_names[0]=="Road"))
+                left_range+=1;
+            else
+                break;
+        }
+        #if(left_range>right_range)
+        #{
+        #    setprop("/controls/flight/rudder",-(right_range-left_range)*(right_range-left_range)/10000);
+        #    print("right ",right_range);
+        #}
+        #else if(left_range<right_range)
+        #{
+        #    setprop("/controls/flight/rudder",(right_range-left_range)*(right_range-left_range)/10000);
+        #    print("left ",left_range);
+        #}
+        #else
+        #    setprop("/controls/flight/rudder",0);
+        props.getNode("/controls/flight/rudder",1).setValue((right_range-left_range)/200);
+    }
+};
+var road_check_timer = maketimer(0.1,road_check_func);
+var toggle_auto_pilot = func(){
+    if(!road_check_timer.isRunning)
+    {
+        road_check_timer.start();
+        props.getNode("/sim/messages/copilot",1).setValue("ze dong sheng teaan see tong yee tse yung. Auto Sheng Teaan System Activated!");
+    }
+    else
+    {
+        road_check_timer.stop();
+        props.getNode("/sim/messages/copilot",1).setValue("ze dong sheng teaan see tong yee guan bee. Auto Sheng Teaan System is off.");
+    }
+}
\ No newline at end of file
diff --git a/testing_files/call_ide.txt b/testing_files/call_ide.txt
new file mode 100644
index 0000000..95ae9c3
--- /dev/null
+++ b/testing_files/call_ide.txt
@@ -0,0 +1,30 @@
+id[0] and id[1];
+1 or 2;
+"str" ==1;
+1*1/1+1;
+2*3*4/1-2+3;
+1-1+20-2*10;
+1+s1*(s2+s3[0])-1;
+var e=1+s1*(s2+s3[0])-1;
+id;
+"str";
+id(id);
+id("str",1,1);
+var e=1;
+var x=10*2-20;
+var id;
+var id=[1,2,3,4];
+var id={id:"str"};
+id();
+id.id();
+id.id.id();
+id[0].id.id(id,"str",1,2,3,4).id[10];
+id(0)[1].id;
+var hash={
+   h:"hello",
+   parent:[id],
+};
+function_test([1,2,3,4,55],1,2,3,{str:"str"});
+var (i,j,k,l,m,n) =[1,2,3,4,5,6];
+(var i,j,k)=[1,2,3];
+e=e[1:][0];
\ No newline at end of file
diff --git a/testing_files/choose.txt b/testing_files/choose.txt
new file mode 100644
index 0000000..9d5ecf5
--- /dev/null
+++ b/testing_files/choose.txt
@@ -0,0 +1,38 @@
+if(this_token.type==__if)
+{
+    parse.push(this_token);
+    return;
+}
+elsif(this_token.type==__elsif)
+{
+    parse.push(this_token);
+    return;
+}
+else if(this_token.type!=__else)
+{
+    exit(0);
+}
+elsif(this_token.type==__elsif)
+{
+    parse.push(this_token);
+    return;
+}
+elsif(this_token.type==__elsif)
+{
+    parse.push(this_token);
+    return;
+}
+else if(this==(1+2+3*1))
+{
+    return nil;
+}
+else
+{
+    parse.push(this_token);
+    return;
+}
+
+if(!id)
+{
+    exit(0);
+}
diff --git a/testing_files/first_pro.nas b/testing_files/first_pro.nas
new file mode 100644
index 0000000..26e62d7
--- /dev/null
+++ b/testing_files/first_pro.nas
@@ -0,0 +1,6 @@
+print("hello world!\n");
+print("This is the first program for nasal--\n");
+var cnt=0;
+for(var i=1;i<101;i+=1)
+    cnt+=i;
+print(cnt);
\ No newline at end of file
diff --git a/testing_files/func.txt b/testing_files/func.txt
new file mode 100644
index 0000000..023e5bd
--- /dev/null
+++ b/testing_files/func.txt
@@ -0,0 +1,10 @@
+var f=func(n,m,dynamic...)
+{
+    print(n+m," ",dynamic);
+    n=dynamic;
+    m=dynamic;
+    n+=m;
+    return dynamic;
+};
+print(f(1,1,0,0,0,0,0,(1+2+3+(1+2+3+4)))[3]);
+function([0,1,2,3],{str:"str"});
\ No newline at end of file
diff --git a/testing_files/loop.txt b/testing_files/loop.txt
new file mode 100644
index 0000000..82319e9
--- /dev/null
+++ b/testing_files/loop.txt
@@ -0,0 +1,38 @@
+while(n==1 )
+{
+    i=i+1;
+    f(i);
+    print("str");
+}
+
+while(n==1 and "str"==str)
+{
+    print("str");
+}
+
+i+=i1;
+i+=i.i[0];
+i=i.i[0].i(0);
+var hash={
+    f:func {var e=1;return 0;},
+};
+for(var i=0;i<1024;i+=1)
+{
+    print(i);
+}
+for(var i=0;(2*512)>=i;i+=1)
+{
+    print(i);
+}
+foreach(var i;[1+(1+1),2,3,4])
+{
+    print(i);
+}
+forindex(var i=list;[1,2,3,4])
+{
+    print(i[0]);
+}
+while(!id)
+{
+    print("yes");
+}
\ No newline at end of file