diff --git a/README.md b/README.md
new file mode 100644
index 0000000..46878d0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,12 @@
+# Animation Scripts
+
+This repository contains scripts and other tools for 2D digital to analog anamation.
+
+
+## fourcell.sh
+
+Example:
+
+```
+bash fourcell.sh example.calibration.json dir/of/images output/dir
+```
\ No newline at end of file
diff --git a/common.sh b/common.sh
index 900e4a0..61238dd 100644
--- a/common.sh
+++ b/common.sh
@@ -51,4 +51,21 @@ axdraw () {
 	echo "START:$(date '+%s')"
 	ax "${1}" 2>&1
 	echo "END:$(date '+%s')"
+}
+
+get_outer_ratio () {
+	
+	AX=$(cat "${1}" | jq -r '.["0"]["0"].x')
+	AY=$(cat "${1}" | jq -r '.["0"]["0"].y')
+	BX=$(cat "${1}" | jq -r '.["0"]["1"].x')
+	BY=$(cat "${1}" | jq -r '.["0"]["1"].y')
+	CX=$(cat "${1}" | jq -r '.["0"]["2"].x')
+	CY=$(cat "${1}" | jq -r '.["0"]["2"].y')
+	DX=$(cat "${1}" | jq -r '.["0"]["3"].x')
+	DY=$(cat "${1}" | jq -r '.["0"]["3"].y')
+	ACX=$(echo "${CX}-${AX}" | bc)
+	DBX=$(echo "${DX}-${BX}" | bc)
+	ACY=$(echo "${AY}-${CY}" | bc)
+	DBY=$(echo "${DY}-${BY}" | bc)
+	echo "scale=4;((${ACY}+${DBY})/2) / ((${ACX}+${DBX})/2)" | bc
 }
\ No newline at end of file
diff --git a/fourcell.sh b/fourcell.sh
index aab6ec1..f702a3c 100644
--- a/fourcell.sh
+++ b/fourcell.sh
@@ -3,7 +3,7 @@
 #set -e
 
 if [[ "${1}" == "" ]]; then
-	echo "Please provide a calibration JSON"
+	echo "Please provide a template JSON"
 fi
 
 if [[ "${2}" == "" ]]; then
diff --git a/template_ratio.sh b/template_ratio.sh
new file mode 100644
index 0000000..18383db
--- /dev/null
+++ b/template_ratio.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+source ./common.sh
+
+get_outer_ratio "${1}"
\ No newline at end of file
diff --git a/white_fourcell.sh b/white_fourcell.sh
index fcd0f2b..45af295 100644
--- a/white_fourcell.sh
+++ b/white_fourcell.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+source ./common.sh
+
 #iWidth  323 = oWidth  404
 #iHeight 242 = oHeight 374
 
@@ -7,6 +10,11 @@ SCALE=$(echo "scale=$DIGITS; 323/404" | bc)
 OUTER=$(echo "scale=$DIGITS; 374/404" | bc)
 RATIO=$(echo "scale=$DIGITS; 242/323" | bc)
 
+# current ratio 1.088
+# template ratio 1.291
+
+
+
 if [[ "${1}" != "" ]]; then
 	DPI=${1}
 else