diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index c61e7a2..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-build-fx/
-*.g1a
\ No newline at end of file
diff --git a/src/calccity.h b/src/calccity.h
new file mode 100644
index 0000000..9965329
--- /dev/null
+++ b/src/calccity.h
@@ -0,0 +1,31 @@
+#ifndef _CALCCITY_H
+#define _CALCCITY_H
+
+struct calccity = 
+{
+	// human's statistics = {happyness, health, education, housing, work, food, transport, grabage, graves} 
+	signed long statistics[9] = {0};
+
+	// population evolution = {birth, death, immigration, emmigration}
+
+	// production = {water, power}
+	signed long production[2] = {0};
+
+	// consumption = {water, power}
+	signed long consumption[2] = {0};
+
+	// risks and safety = {crime, safety, fire_hazard, nuclear_hazard, pollution}
+	signed long risks[5] = {0};
+
+	// taxes on {housing, trade, industry, export}
+	int taxes[4] = {10, 10, 10, 10};
+
+	// industry statistics = {import, export, production, commercial, industrial, }
+};
+
+struct mouse = 
+{
+
+};
+
+#endif /* _CALCCITY_H */
\ No newline at end of file