diff --git a/Nasal/bo105.nas b/Nasal/bo105.nas
new file mode 100644
index 000000000..78dd91fe1
--- /dev/null
+++ b/Nasal/bo105.nas
@@ -0,0 +1,36 @@
+# $Id$
+print("Loading bo105.nas");
+print("\tShift-C ... open/close rear door");
+
+rearpos = "/controls/doors/rear";
+rearstep = "/controls/doors/rear-state";
+setprop(rearstep, 0);
+
+reardoor = func {
+	pos = getprop(rearpos);
+	step = getprop(rearstep);
+	if (pos == 0 or step < 0) {
+		setprop(rearstep, 0.02);
+	} elsif (pos == 1 or step > 0) {
+		setprop(rearstep, -0.02);
+	}
+	settimer(MoveDoor, 0.05);
+}
+
+MoveDoor = func {
+	pos = getprop(rearpos);
+	step = getprop(rearstep);
+	if (pos + step >= 0 and pos + step <= 1) {
+		setprop(rearpos, pos + step);
+		settimer(MoveDoor, 0.05);
+	} else {
+		if (step < 0) {
+			setprop(rearpos, 0);
+		} elsif (step > 0) {
+			setprop(rearpos, 1);
+		}
+		setprop(rearstep, 0);
+	}
+}
+
+print("Finished loading bo105.nas");