diff --git a/gridfinity.scad b/gridfinity.scad
new file mode 100644
index 0000000..90e30d5
--- /dev/null
+++ b/gridfinity.scad
@@ -0,0 +1,63 @@
+
+$fn=50;
+
+HIEGHT = 1;
+
+module square_rounded(size1, size2, r1, r2, h) {
+	union() {
+		difference() {
+			translate([0, 0, h/2]) {
+				cube([size1-r1*2, size2, h], center=true);
+				cube([size2, size1-r1*2, h], center=true);
+			}
+			for(r=[0, 90, 180, -90])
+			rotate([0, 0, r])
+			translate([-size2/2, size1/2, 0])
+			rotate([-45, 0, 0])
+				cube([size2, 100, 2*h]);
+		}
+		for(r=[0, 90, 180, -90])
+		rotate([0, 0, r])
+		translate([size1/2-r1, size1/2-r1]) 
+			cylinder(h=h, r1=r1, r2=r2);
+	}
+}
+
+module gf_bottom() {
+	union() {
+		square_rounded(size1=35.6, size2=37.2, r1=0.8, r2=1.6, h=0.8);
+		translate([0, 0, 0.8])
+			square_rounded(size1=37.2, size2=37.2, r1=1.6, r2=1.6, h=1.8);
+		translate([0, 0, 2.6])
+			square_rounded(size1=37.2, size2=41.5, r1=1.6, r2=3.75, h=2.15);
+	}
+}
+
+module gf_socker_cut() {
+	t = 0.25;
+	a = sin(45)*t;
+	b = a*tan(22.5);
+	c = t/sin(45);
+	echo(a+b);
+	translate([0, 0, -a])
+	union() {
+		square_rounded(size1=35.6+a*2, size2=37.2+2*t, r1=0.8+a, r2=1.6+t, h=0.8+b);
+		translate([0, 0, 0.8+b])
+			square_rounded(size1=37.2+2*t, size2=37.2+2*t, r1=1.6+t, r2=1.6+t, h=1.8);
+		translate([0, 0, 2.6+b])
+			square_rounded(size1=37.2+2*t, size2=41.5+2*c, r1=1.6+t, r2=3.75+c, h=2.15+a-b-0.001);
+	}
+}
+
+// gf_bottom();
+// gf_socker_cut();
+
+difference() {
+	union() {
+		gf_bottom();
+		translate([0, 0, 4.75])
+			square_rounded(size1=41.5, size2=41.5, r1=3.75, r2=3.75, h=HIEGHT*7+4.4-4.75);
+	}
+	translate([0, 0, HIEGHT*7+4.4])
+		gf_socker_cut();
+}