diff --git a/src/main.rs b/src/main.rs
index 2f8e437..00f0944 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -129,6 +129,7 @@ fn run(mut scs: scs::Instance, mut p: hcl::platform::Instance) {
         st7735io.fill_rect(80, 4, 76, 60, st7735::COLOR_BLUE);
         st7735io.fill_rect(80, 64, 76, 60, st7735::COLOR_YELLOW);
 
+        st7735io.draw_circle(80, 64, 20, st7735::COLOR_MAGENTA);
 
         st7735io.draw_line(4, 4, 80, 64, st7735::COLOR_GREEN);
         systick::delay_ms(2000);
diff --git a/src/st7735/gfx.rs b/src/st7735/gfx.rs
index c458627..209ce4d 100644
--- a/src/st7735/gfx.rs
+++ b/src/st7735/gfx.rs
@@ -85,4 +85,42 @@ pub trait GFX : PrimitveGFX {
     	}
 
     }
+
+    fn draw_circle(&mut self, x0 : u8, y0 : u8, r : u8,  color : u16) {
+    	let mut f : i16 = 1 - (r as i16);
+    	let mut ddF_x : i16 = 1;
+    	let mut ddF_y : i16 = -2 * (r as i16);
+    	let mut x : i16 = 0;
+    	let mut y : i16 = r as i16;
+
+    	self.draw_pixel(x0, y0 + r, color);
+    	self.draw_pixel(x0, y0 - r, color);
+    	self.draw_pixel(x0 + r, y0, color);
+    	self.draw_pixel(x0 - r, y0, color);
+
+        let x0 = x0 as i16;
+        let y0 = y0 as i16;
+        let r = r as i16;
+
+    	while x < y {
+    		if f >= 0 {
+    			y -= 1;
+    			ddF_y += 2;
+    			f += ddF_y;
+    		}
+
+    		x += 1;
+    		ddF_x += 2;
+    		f += ddF_x;
+
+    		self.draw_pixel((x0 + x) as u8, (y0 + y) as u8, color);
+    		self.draw_pixel((x0 - x) as u8, (y0 + y) as u8, color);
+    		self.draw_pixel((x0 + x) as u8, (y0 - y) as u8, color);
+    		self.draw_pixel((x0 - x) as u8, (y0 - y) as u8, color);
+    		self.draw_pixel((x0 + y) as u8, (y0 + x) as u8, color);
+    		self.draw_pixel((x0 - y) as u8, (y0 + x) as u8, color);
+    		self.draw_pixel((x0 + y) as u8, (y0 - x) as u8, color);
+    		self.draw_pixel((x0 - y) as u8, (y0 - x) as u8, color);
+    	}
+    }
 }