diff --git a/curves/sim.py b/curves/sim.py
index eba9ab8..74e4b17 100644
--- a/curves/sim.py
+++ b/curves/sim.py
@@ -1,7 +1,29 @@
 import pandas as pd
+import math
 
 def circle(radius: float, n_points: int) -> pd.DataFrame:
-    # Returns a dataframe with columns `x` and `y`
-    # These are the co-ordinates of points on a circle of
-    # specified radius, with n_points evenly spaced
-    pass
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+    """
+    Generate a circle of points.
+
+    Returns a dataframe with columns 'x' and 'y' corresponding to 
+    points uniformly spaced in a circular formation. 
+
+    Parameters 
+    ----------
+    radius : float
+        The radius of the circle 
+    n_ponts : int 
+        The number of points that the circle should be
+        comprised of.
+
+    Returns
+    ----------
+    out : pandas.DataFrame
+        Dataframe containing columns 'x' and 'y' as coordinates
+        for points on the circle.
+
+    """
+
+    points = [(math.cos(2*math.pi/n_points*x)*radius,math.sin(2*math.pi/n_points*x)*radius) for x in range(0,n_points+1)]
+    df = pd.DataFrame(data=points, columns=['x','y'])
+    return df
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