diff --git a/module/keyboard.cpp b/module/keyboard.cpp
new file mode 100644
index 0000000..93242f4
--- /dev/null
+++ b/module/keyboard.cpp
@@ -0,0 +1,75 @@
+#include "../nasal.h"
+#include <iostream>
+#ifdef _WIN32
+#include <conio.h>
+#else
+#include <fcntl.h>
+#include <termio.h>
+#endif
+
+#ifndef _WIN32
+static struct termios init_termios;
+static struct termios new_termios;
+static int peek_character=-1;
+
+int kbhit(){
+    unsigned char ch=0;
+    int nread=0;
+    if(peek_character!=-1)
+        return 1;
+    int flag=fcntl(0,F_GETFL);
+    flag|=O_NONBLOCK;
+    fcntl(0,F_SETFL,flag);
+    nread=read(0,&ch,1);
+    flag&=(~O_NONBLOCK);
+    fcntl(0,F_SETFL,flag);
+    if(nread==1)
+    {
+        peek_character=ch;
+        return 1;
+    }
+    return 0;
+}
+
+int getch(){
+    int ch=0;
+    if(peek_character!=-1)
+    {
+        ch=peek_character;
+        peek_character=-1;
+        return ch;
+    }
+    read(0,&ch,1);
+    return ch;
+}
+#endif
+
+extern "C" nasal_ref nas_getch(std::vector<nasal_ref>& args,nasal_gc& gc){
+    return {vm_num,(double)getch()};
+}
+extern "C" nasal_ref nas_kbhit(std::vector<nasal_ref>& args,nasal_gc& gc){
+    return {vm_num,(double)kbhit()};
+}
+extern "C" nasal_ref nas_noblock(std::vector<nasal_ref>& args,nasal_gc& gc){
+    if(kbhit())
+        return {vm_num,(double)getch()};
+    return nil;
+}
+extern "C" nasal_ref nas_init(std::vector<nasal_ref>& args,nasal_gc& gc){
+#ifndef _WIN32
+    tcgetattr(0,&init_termios);
+    new_termios=init_termios;
+    new_termios.c_lflag&=~(ICANON|ECHO|ECHONL);
+    new_termios.c_cc[VMIN]=0;
+    new_termios.c_cc[VTIME]=0;
+    tcsetattr(0,TCSANOW,&new_termios);
+#endif
+    return nil;
+}
+extern "C" nasal_ref nas_close(std::vector<nasal_ref>& args,nasal_gc& gc){
+#ifndef _WIN32
+    tcsetattr(0,TCSANOW,&init_termios);
+    tcflush(0,TCIOFLUSH);
+#endif
+    return nil;
+}
\ No newline at end of file
diff --git a/module/libfib.nas b/module/libfib.nas
new file mode 100644
index 0000000..d68b1b4
--- /dev/null
+++ b/module/libfib.nas
@@ -0,0 +1,13 @@
+import("lib.nas");
+
+var libfib=func(){
+    var dl=dylib.dlopen("./module/libfib."~(os.platform()=="windows"?"dll":"so"));
+    var fib=dylib.dlsym(dl,"fib");
+    var qfib=dylib.dlsym(dl,"quick_fib");
+    var call=dylib.dlcall;
+    return
+    {
+        fib: func(x){return call(fib,x)},
+        qfib:func(x){return call(qfib,x)}
+    };
+}();
\ No newline at end of file
diff --git a/module/libkey.nas b/module/libkey.nas
new file mode 100644
index 0000000..ab0c769
--- /dev/null
+++ b/module/libkey.nas
@@ -0,0 +1,37 @@
+import("lib.nas");
+
+var libkey=func(){
+    var lib=dylib.dlopen("./module/libkey"~(os.platform()=="windows"?".dll":".so"));
+    var kb=dylib.dlsym(lib,"nas_kbhit");
+    var gt=dylib.dlsym(lib,"nas_getch");
+    var nb=dylib.dlsym(lib,"nas_noblock");
+    var init=dylib.dlsym(lib,"nas_init");
+    var cls=dylib.dlsym(lib,"nas_close");
+    var is_init=0;
+    return {
+        init:func(){
+            dylib.dlcall(init);
+            is_init=1;
+        },
+        kbhit:func(){
+            if(!is_init)
+                me.init();
+            return dylib.dlcall(kb);
+        },
+        getch:func(){
+            if(!is_init)
+                me.init();
+            return dylib.dlcall(gt);
+        },
+        nonblock:func(){
+            if(!is_init)
+                me.init();
+            return dylib.dlcall(nb);
+        },
+        close:func(){
+            # must call this function before exiting the program
+            dylib.dlcall(cls);
+            dylib.dlclose(lib);
+        }
+    }
+}();
\ No newline at end of file
diff --git a/module/makefile b/module/makefile
index d1c545b..a175957 100644
--- a/module/makefile
+++ b/module/makefile
@@ -5,5 +5,11 @@ libfib.so: fib.cpp
 libfib.dll: fib.cpp
 	g++ -c -O3 fib.cpp -fPIC -o fib.o
 	g++ -shared -o libfib.dll fib.o
+libkey.so: keyboard.cpp
+	clang++ -c -O3 keyboard.cpp -fPIC -o keyboard.o
+	clang++ -shared -o libkey.so keyboard.o
+libkey.dll: keyboard.cpp
+	g++ -c -O3 keyboard.cpp -fPIC -o keyboard.o
+	g++ -shared -o libkey.dll keyboard.o
 clean:
 	rm *.o *.so *.dll *.dylib
\ No newline at end of file
diff --git a/test/module_test.nas b/test/module_test.nas
index b3502a5..fa48d22 100644
--- a/test/module_test.nas
+++ b/test/module_test.nas
@@ -1,16 +1,5 @@
 import("lib.nas");
-
-var libfib=func(){
-    var dl=dylib.dlopen("./module/libfib."~(os.platform()=="windows"?"dll":"so"));
-    var fib=dylib.dlsym(dl,"fib");
-    var qfib=dylib.dlsym(dl,"quick_fib");
-    var call=dylib.dlcall;
-    return
-    {
-        fib: func(x){return call(fib,x)},
-        qfib:func(x){return call(qfib,x)}
-    };
-}();
+import("./module/libfib.nas");
 
 println(libfib);
 println(libfib.fib(29));
diff --git a/test/tetris.nas b/test/tetris.nas
new file mode 100644
index 0000000..96b14a8
--- /dev/null
+++ b/test/tetris.nas
@@ -0,0 +1,58 @@
+import("lib.nas");
+import("module/libkey.nas");
+
+var brick=[
+    [
+        [1,1],
+        [1,0],
+        [1,0]
+    ],
+    [
+        [0,1],
+        [1,1],
+        [1,0]
+    ],
+    [
+        [1,1],
+        [0,1],
+        [0,1],
+    ],
+    [
+        [1,0],
+        [1,1],
+        [0,1]
+    ],
+    [
+        [1,1,1,1]
+    ],
+    [
+        [1,1],
+        [1,1]
+    ],
+    [
+        [0,1,0],
+        [1,1,1]
+    ]
+];
+
+func(){
+    libkey.init();
+    print('\ec');
+    var cnt=0;
+    while(1){
+        var ch=libkey.nonblock();
+        ch=ch?chr(ch)~chr(ch):"[]";
+        var s="\ec+--------------+\n";
+        var normal="|              |\n";
+        var character="|      "~ch~"      |\n";
+        for(var i=0;i<6;i+=1)
+            s~=(i==cnt)?character:normal;
+        s~="+--------------+\n";
+        print(s);
+        unix.sleep(0.3);
+        cnt+=1;
+        if(cnt==6)
+            cnt=0;
+    }
+    libkey.close();
+}();
\ No newline at end of file