diff --git a/moo/wasm/build.sh b/moo/wasm/build.sh
new file mode 100644
index 0000000..7669057
--- /dev/null
+++ b/moo/wasm/build.sh
@@ -0,0 +1,20 @@
+# temporary build script.
+# must integrate the build process into automake
+
+topdir=../../..
+blddir=${topdir}/bld/emcc
+
+emcc -Wall -O2 -g   \
+	${blddir}/lib/.libs/libmoo.a \
+	${topdir}/wasm/main.c \
+	-DMOO_HAVE_CFG_H \
+	-I${blddir}/lib \
+	-I${topdir}/lib\
+	-s WASM=1 -s LINKABLE=1 \
+	-s EXTRA_EXPORTED_RUNTIME_METHODS="['ccall','cwrap']" \
+	-o libmoo.js \
+	--pre-js ${topdir}/wasm/moo.cb.js
+
+
+cp -pf ${topdir}/wasm/moo.html .
+cp -pf ${topdir}/wasm/moo.worker.js .
diff --git a/moo/wasm/main.c b/moo/wasm/main.c
index a353b6d..b3e7b5c 100644
--- a/moo/wasm/main.c
+++ b/moo/wasm/main.c
@@ -30,16 +30,25 @@ static moo_mmgr_t sys_mmgr =
 /* ========================================================================= */
 
 extern void jsGetTime (moo_ntime_t* now);
+extern void jsSleep (const moo_ntime_t* now);
 
 static void vm_gettime (moo_t* moo, moo_ntime_t* now)
 {
 	jsGetTime(now);
 }
+static void vm_sleep (moo_t* moo, const moo_ntime_t* dur)
+{
+	jsSleep (dur);
+}
+
 
 EMSCRIPTEN_KEEPALIVE int open_moo (void)
 {
 	moo_ntime_t now;
 	vm_gettime (NULL, &now);
+	now.sec = 1;
+	now.nsec = 500;
+	vm_sleep (NULL, &now);
 	return now.sec;
 #if 0
 	moo_t* moo;
diff --git a/moo/wasm/moo.cb.js b/moo/wasm/moo.cb.js
index ec7240f..99c3429 100644
--- a/moo/wasm/moo.cb.js
+++ b/moo/wasm/moo.cb.js
@@ -6,3 +6,17 @@ var _jsGetTime = function(pointer)
 	HEAP32[pos] = Math.floor(now / 1000);
 	HEAP32[pos + 1] = (now % 1000) * 1000000;
 }
+
+var _jsSleep = function(pointer)
+{
+/*
+	var pos = pointer / 4;
+	var msec = (HEAP32[POS] * 1000) + (HEAP32[pos + 1] / 1000000);
+
+	var prom = new Promise(function (resolve, reject) {
+		setTimeout (function() { resolve("xxxx"); }, msec);
+	});	
+
+	await prom;
+*/
+}