diff --git a/Documentation1.md b/Documentation1.md
index 28f94fa..11c24dd 100644
--- a/Documentation1.md
+++ b/Documentation1.md
@@ -1,19 +1,19 @@
-# Name: 
+# Name: frac()
 
 ## Examples:
-Insert examples here.
+frac(PI) = 335/113
 
 ## Description:
-Insert description here
+Takes a float and returns a fractional approximation of it.
 
 ## Syntax:
-Demonstrate syntax here
+frac(float x);
 
 ##Parameters: 
-Name and describe parameters here
+float x: the float you want to approximate
 
 ##Returns:
-What type of data does it return?
+String
 
 ##Other notes:
-Anything else?
+None
diff --git a/Documentation2.md b/Documentation2.md
index 28f94fa..89d8fc4 100644
--- a/Documentation2.md
+++ b/Documentation2.md
@@ -1,19 +1,22 @@
 # Name: 
+grav()
 
 ## Examples:
-Insert examples here.
+grav(25,r1,34,r2) = something
 
 ## Description:
-Insert description here
+gives gravitational force between two objects given their masses and positions
 
 ## Syntax:
-Demonstrate syntax here
+grav(m1,r1,m2,r2);
 
 ##Parameters: 
-Name and describe parameters here
+m1: mass of 1st object
+r1: position vector of 1st object
+m2,r2: mass and position of 2nd object
 
 ##Returns:
-What type of data does it return?
+float
 
 ##Other notes:
-Anything else?
+None
diff --git a/Documentation3.md b/Documentation3.md
index 28f94fa..5b5b079 100644
--- a/Documentation3.md
+++ b/Documentation3.md
@@ -1,19 +1,19 @@
-# Name: 
+# Name: sier()
 
 ## Examples:
-Insert examples here.
+sier(5) gives 6-iteration of sierpinsky triangle
 
 ## Description:
-Insert description here
+draws sierpinsky triangle recursively
 
 ## Syntax:
-Demonstrate syntax here
+sier(int k);
 
 ##Parameters: 
-Name and describe parameters here
+k is the number of iterations to go through in making triangle, starting from 0 as one triangle.
 
 ##Returns:
-What type of data does it return?
+Does not return data
 
 ##Other notes:
-Anything else?
+None
diff --git a/FunctionsChallenge/FunctionsChallenge.pde b/FunctionsChallenge/FunctionsChallenge.pde
new file mode 100644
index 0000000..a3e0236
--- /dev/null
+++ b/FunctionsChallenge/FunctionsChallenge.pde
@@ -0,0 +1,42 @@
+//creates a fake fraction string very close to or exactly given float value
+String frac(float x) {
+  for (int i = 1; i<1000000; i++) {
+    if (abs(i*x-round(i*x))<0.000001) {
+      String s = str(round(i*x));
+      String t = str(i);
+      String a = s+ "/" +t;
+      return a;
+    }
+  }
+  //if we take denominator to a million and can't find something close enough
+  return "no approximation with desired precision";
+}
+
+//gravitational force between two objects given positions and masses
+float grav(float m1, PVector r1, float m2, PVector r2) {
+  float d = r1.dist(r2);
+  return 0.0000000000667408*m1*m2/(d*d);
+}
+
+//recurses a sierpinsky triangle. k is # of times to recurse
+void sier(int k, float x, float y) {
+  if (k == 0) {
+    triangle(x,y,x+5,y+8.66,x+10,y);
+  }
+  else {
+    sier(k-1,x,y);
+    sier(k-1,x+(10*pow(2,k-1)),y);
+    sier(k-1,x+(5*pow(2,k-1)),y+(8.66*pow(2,k-1)));
+  }
+}
+
+void setup() {
+  size(800,600);
+}
+
+void draw() {
+  background(0);
+  text(frac(8.8490396),0,height);
+  fill(255);
+  sier(6,0,0);
+}
\ No newline at end of file