diff --git a/client/luascripts/hf_mf_efmt.lua b/client/luascripts/hf_mf_efmt.lua
new file mode 100644
index 000000000..3ce8bb474
--- /dev/null
+++ b/client/luascripts/hf_mf_efmt.lua
@@ -0,0 +1,136 @@
+local getopt = require('getopt')
+local ansicolors = require('ansicolors')
+
+--Copyright
+copyright = ''
+author = 'nisgola'
+version = 'v1'
+
+-- Script description
+desc = [[
+This is a script that write Sector Trailers to the emulator memory.
+
+By default, both keys A and B are set to 0xFFFFFFFFFFFF.
+The Access Bytes are set to 0xFF0780 and User Bytes to 0x00.
+]]
+example = [[
+    -- Use default formatting
+    1. script run hf_mf_efmt
+
+    -- Change keys A and B
+    2. script run hf_mf_efmt -a 112233445566 -b AABBCCDDEEFF
+
+    -- Define access bits and User byte
+    3. script run hf_mf_efmt -x 00f0ff -u 12
+
+    -- Format as 4K card
+    4. script run hf_mf_efmt -4
+]]
+
+-- Usage info
+usage = [[
+script run hf_mf_efmt [-h] [-4] [-a <hex>] [-b <hex>] [-x <hex>] [-u <hex>]
+]]
+
+-- Arguments
+arguments = [[
+    -h          this help
+    -4		Format as 4K card instead of the default 1K
+    -a <hex>    define key A
+    -b <hex>    define key B
+    -x <hex>    define Access Byts
+    -u <hex>	define User Byte
+
+]]
+
+-- Help function
+local function help()
+    print(copyright)
+    print(author)
+    print(version)
+    print(desc)
+    print(ansicolors.cyan..'Usage'..ansicolors.reset)
+    print(usage)
+    print(ansicolors.cyan..'Arguments'..ansicolors.reset)
+    print(arguments)
+    print(ansicolors.cyan..'Example usage'..ansicolors.reset)
+    print(example)
+end
+
+-- Print error
+local function oops(err)
+    print('ERROR:', err)
+    core.clearCommandBuffer()
+    return nil, err
+end
+
+--  Command function
+local function cmdFormatEmul()
+    local arr = {}
+    for i = 0, 15 do
+        local blk = 3 + (4*i)
+        arr[i] = 'hf mf esetblk --blk '..blk..' -d '..KeyA..''..Accessbit..''..User..''..KeyB..''
+    end
+
+-- This looks horrible, but I don't know anything about Lua
+    if S70 then
+	for i = 16, 31 do
+	local blk = 3 + (4*i)
+        arr[i] = 'hf mf esetblk --blk '..blk..' -d '..KeyA..''..Accessbit..''..User..''..KeyB..''
+	end
+	for i = 32, 40 do
+		local blk = 127 + (16*(i-32))
+	        arr[i] = 'hf mf esetblk --blk '..blk..' -d '..KeyA..''..Accessbit..''..User..''..KeyB..''
+	end
+    end
+    return arr
+end
+local function sendCmds( cmds )
+    for i = 0, #cmds do
+        if cmds[i]  then
+            print ( cmds[i]  )
+            core.console( cmds[i] )
+            core.clearCommandBuffer()
+        end
+    end
+end
+
+-- main function
+function main(args)
+
+	local i
+	local cmds = {}
+	
+	-- Receive parameters
+	for o, a in getopt.getopt(args, 'ha:b:x:u:4') do
+		if o == 'h' then return help() end
+		if o == 'a' then KeyA = a end
+		if o == 'b' then KeyB = a end
+		if o == 'x' then Accessbit = a end
+		if o == 'u' then User = a end
+		if o == '4' then S70 = true end
+	end
+
+	-- Validate inputs
+	KeyA = KeyA or 'FFFFFFFFFFFF'
+	if #(KeyA) ~= 12 then
+		return oops( string.format('Wrong length of the Key A (was %d) expected 12', #KeyA))
+	end
+	KeyB = KeyB or 'FFFFFFFFFFFF'
+	if #(KeyB) ~= 12 then
+		return oops( string.format('Wrong length of the Key B (was %d) expected 12', #KeyB))
+	end
+	Accessbit = Accessbit or 'FF0780'
+	if #(Accessbit) ~= 6 then
+		return oops( string.format('Wrong length of the Acces bit (was %d) expected 6', #Accessbit))
+	end
+	User = User or '00'
+	if #(User) ~= 2 then
+		return oops( string.format('Wrong lenght for the user defined byte, (was %d) expected 2', #User))
+	end
+
+	-- Send commands to proxmark
+	core.clearCommandBuffer()
+	sendCmds( cmdFormatEmul() )
+end
+main (args)