Added a tinygo example.

examples/tinygo/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"math"
+	"unsafe"
+)
+
+//go:wasm-module env
+//export atan2
+func atan2(x, y float32) float32
+
+//go:wasm-module env
+//export time
+func time() float32
+
+func sqrt(v float32) float32 {
+	return float32(math.Sqrt(float64(v)))
+}
+
+var FRAMEBUFFER = (*[320 * 240]byte)(unsafe.Pointer(uintptr(120)))
+
+//export upd
+func upd() {
+	var i int
+	for i < 320*240 {
+		t := time() * 63.0
+		x := float32(i%320 - 160)
+		y := float32(i/320 - 120)
+		d := float32(40000.0) / sqrt(x*x+y*y)
+		u := atan2(x, y) * 512.0 / 3.141
+		c := uint8((int(d+t*2.0) ^ int(u+t)) >> 4)
+		FRAMEBUFFER[i] = c
+		i++
+	}
+}
+
+func main() {
+}