diff --git a/GravityField/.gitignore b/GravityField/.gitignore
new file mode 100644
index 0000000..69d81d1
--- /dev/null
+++ b/GravityField/.gitignore
@@ -0,0 +1,2 @@
+
+essai
diff --git a/GravityField/Makefile b/GravityField/Makefile
new file mode 100644
index 0000000..8ae5ec0
--- /dev/null
+++ b/GravityField/Makefile
@@ -0,0 +1,8 @@
+#
+# Fortraneries by tTh - Gravity Field
+#
+
+GFOPT = -Wall -Wextra -g -time 
+
+essai:	essai.f90  Makefile
+	gfortran $(GFOPT) $<  -o $@
diff --git a/GravityField/README.md b/GravityField/README.md
new file mode 100644
index 0000000..5dd6455
--- /dev/null
+++ b/GravityField/README.md
@@ -0,0 +1,5 @@
+# Gravity Field
+
+Some crude experiments to make fancy picture of a useless gravaity field.
+
+Expect bug party.
diff --git a/GravityField/essai.f90 b/GravityField/essai.f90
new file mode 100644
index 0000000..86ca747
--- /dev/null
+++ b/GravityField/essai.f90
@@ -0,0 +1,62 @@
+program essai
+  implicit none
+
+  integer                 :: ix, iy
+  real                    :: fx, fy
+  real                    :: foo, bar, maxi, mini
+
+  maxi = 0.0
+  mini = 9e9
+
+  do ix=1, 2000
+    fx = real(ix)
+    do iy=1, 2000
+      fy = real(iy)
+
+      foo = rdist(fx, fy, 222.22, 765.432)
+      bar = gravity(foo, 1337.0)
+
+      maxi = max(maxi, bar)
+      mini = min(mini, bar)
+
+    enddo
+  enddo
+
+  print *, "dist : ", mini, maxi
+
+contains        !------------------------------------------
+
+function gravity(distance, masse)
+  real, intent(in)      :: distance, masse
+  real                  :: gravity
+  real                  :: computed
+
+  if (distance .LT.  0.010) then
+    computed = 0.0
+  else
+    computed = masse / (distance ** 2)
+  endif
+
+  gravity = computed
+
+end function
+
+                !------------------------------------------
+
+function rdist(ax, ay, bx, by)
+  real, intent(in)       :: ax, ay, bx, by
+  real                      :: rdist
+  real                      :: rx, ry
+
+  rx = real(ax-bx)
+  ry = real(ay-by)
+
+  rdist = sqrt( (rx*rx) + (ry*ry) )
+
+end function
+
+
+                !------------------------------------------
+                !------------------------------------------
+
+end program